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Expresiones idénticas
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- x en el grado 4+2*x en el grado 2-8*x-7=0
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Expresiones semejantes
- x^4+2*x^2-8*x+7=0
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- x^4-2*x^2-8*x-7=0
x^4+2*x^2-8*x-7=0 la ecuación
El profesor se sorprenderá mucho al ver tu solución correcta😉
Solución
Ha introducido
[src]
4 2 x + 2*x - 8*x - 7 = 0
$$\left(- 8 x + \left(x^{4} + 2 x^{2}\right)\right) - 7 = 0$$
Suma y producto de raíces
[src]
suma
_______________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________ _____________________________________________________________________________________________________________________________ _____________________________________________________________________________________________________________________________
/ ________________ / ________________ / ________________ / ________________
/ / ____ / / ____ / / ____ / / ____
/ 8 / 172 4*\/ 29 16 40 / 8 / 172 4*\/ 29 16 40 / 8 / 172 4*\/ 29 16 40 / 8 / 172 4*\/ 29 16 40
/ - - - 2*3 / --- + -------- + ------------------------------------------------------------------- + ----------------------- / - - - 2*3 / --- + -------- + ------------------------------------------------------------------- + ----------------------- I* / - + 2*3 / --- + -------- + ------------------------------------------------------------------- - ----------------------- I* / - + 2*3 / --- + -------- + ------------------------------------------------------------------- - -----------------------
_________________________________________________________ / 3 \/ 27 3 _________________________________________________________ ________________ _________________________________________________________ / 3 \/ 27 3 _________________________________________________________ ________________ _________________________________________________________ / 3 \/ 27 3 _________________________________________________________ ________________ _________________________________________________________ / 3 \/ 27 3 _________________________________________________________ ________________
/ ________________ / / ________________ / ____ / ________________ / / ________________ / ____ / ________________ / / ________________ / ____ / ________________ / / ________________ / ____
/ / ____ / / / ____ / 172 4*\/ 29 / / ____ / / / ____ / 172 4*\/ 29 / / ____ / / / ____ / 172 4*\/ 29 / / ____ / / / ____ / 172 4*\/ 29
/ 4 / 172 4*\/ 29 40 / / 4 / 172 4*\/ 29 40 9*3 / --- + -------- / 4 / 172 4*\/ 29 40 / / 4 / 172 4*\/ 29 40 9*3 / --- + -------- / 4 / 172 4*\/ 29 40 / / 4 / 172 4*\/ 29 40 9*3 / --- + -------- / 4 / 172 4*\/ 29 40 / / 4 / 172 4*\/ 29 40 9*3 / --- + --------
/ - - + 2*3 / --- + -------- - ----------------------- / / - - + 2*3 / --- + -------- - ----------------------- \/ 27 3 / - - + 2*3 / --- + -------- - ----------------------- / / - - + 2*3 / --- + -------- - ----------------------- \/ 27 3 / - - + 2*3 / --- + -------- - ----------------------- / / - - + 2*3 / --- + -------- - ----------------------- \/ 27 3 / - - + 2*3 / --- + -------- - ----------------------- / / - - + 2*3 / --- + -------- - ----------------------- \/ 27 3
/ 3 \/ 27 3 ________________ / / 3 \/ 27 3 ________________ / 3 \/ 27 3 ________________ / / 3 \/ 27 3 ________________ / 3 \/ 27 3 ________________ / / 3 \/ 27 3 ________________ / 3 \/ 27 3 ________________ / / 3 \/ 27 3 ________________
/ / ____ / / / ____ / / ____ / / / ____ / / ____ / / / ____ / / ____ / / / ____
/ / 172 4*\/ 29 / / / 172 4*\/ 29 / / 172 4*\/ 29 / / / 172 4*\/ 29 / / 172 4*\/ 29 / / / 172 4*\/ 29 / / 172 4*\/ 29 / / / 172 4*\/ 29
/ 9*3 / --- + -------- / / 9*3 / --- + -------- / 9*3 / --- + -------- / / 9*3 / --- + -------- / 9*3 / --- + -------- / / 9*3 / --- + -------- / 9*3 / --- + -------- / / 9*3 / --- + --------
\/ \/ 27 3 \/ \/ \/ 27 3 \/ \/ 27 3 \/ \/ \/ 27 3 \/ \/ 27 3 \/ \/ \/ 27 3 \/ \/ 27 3 \/ \/ \/ 27 3
------------------------------------------------------------------- + ---------------------------------------------------------------------------------------------------------------------------------------------- + ------------------------------------------------------------------- - ---------------------------------------------------------------------------------------------------------------------------------------------- + - ------------------------------------------------------------------- - ---------------------------------------------------------------------------------------------------------------------------------------------- + - ------------------------------------------------------------------- + ----------------------------------------------------------------------------------------------------------------------------------------------
2 2 2 2 2 2 2 2
$$\left(\left(\left(- \frac{\sqrt{- 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}} - \frac{8}{3} + \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} + \frac{16}{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}}}{2} + \frac{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}{2}\right) + \left(\frac{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}{2} + \frac{\sqrt{- 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}} - \frac{8}{3} + \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} + \frac{16}{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}}}{2}\right)\right) + \left(- \frac{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}{2} - \frac{i \sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} + \frac{8}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}} + \frac{16}{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}}}{2}\right)\right) + \left(- \frac{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}{2} + \frac{i \sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} + \frac{8}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}} + \frac{16}{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}}}{2}\right)$$
=
0
$$0$$
producto
/ _______________________________________________________________________________________________________________________________\ / _______________________________________________________________________________________________________________________________\ / _____________________________________________________________________________________________________________________________\ / _____________________________________________________________________________________________________________________________\ | / ________________ | | / ________________ | | / ________________ | | / ________________ | | / / ____ | | / / ____ | | / / ____ | | / / ____ | | / 8 / 172 4*\/ 29 16 40 | | / 8 / 172 4*\/ 29 16 40 | | / 8 / 172 4*\/ 29 16 40 | | / 8 / 172 4*\/ 29 16 40 | | / - - - 2*3 / --- + -------- + ------------------------------------------------------------------- + ----------------------- | | / - - - 2*3 / --- + -------- + ------------------------------------------------------------------- + ----------------------- | | I* / - + 2*3 / --- + -------- + ------------------------------------------------------------------- - ----------------------- | | I* / - + 2*3 / --- + -------- + ------------------------------------------------------------------- - ----------------------- | | _________________________________________________________ / 3 \/ 27 3 _________________________________________________________ ________________ | | _________________________________________________________ / 3 \/ 27 3 _________________________________________________________ ________________ | | _________________________________________________________ / 3 \/ 27 3 _________________________________________________________ ________________ | | _________________________________________________________ / 3 \/ 27 3 _________________________________________________________ ________________ | | / ________________ / / ________________ / ____ | | / ________________ / / ________________ / ____ | | / ________________ / / ________________ / ____ | | / ________________ / / ________________ / ____ | | / / ____ / / / ____ / 172 4*\/ 29 | | / / ____ / / / ____ / 172 4*\/ 29 | | / / ____ / / / ____ / 172 4*\/ 29 | | / / ____ / / / ____ / 172 4*\/ 29 | | / 4 / 172 4*\/ 29 40 / / 4 / 172 4*\/ 29 40 9*3 / --- + -------- | | / 4 / 172 4*\/ 29 40 / / 4 / 172 4*\/ 29 40 9*3 / --- + -------- | | / 4 / 172 4*\/ 29 40 / / 4 / 172 4*\/ 29 40 9*3 / --- + -------- | | / 4 / 172 4*\/ 29 40 / / 4 / 172 4*\/ 29 40 9*3 / --- + -------- | | / - - + 2*3 / --- + -------- - ----------------------- / / - - + 2*3 / --- + -------- - ----------------------- \/ 27 3 | | / - - + 2*3 / --- + -------- - ----------------------- / / - - + 2*3 / --- + -------- - ----------------------- \/ 27 3 | | / - - + 2*3 / --- + -------- - ----------------------- / / - - + 2*3 / --- + -------- - ----------------------- \/ 27 3 | | / - - + 2*3 / --- + -------- - ----------------------- / / - - + 2*3 / --- + -------- - ----------------------- \/ 27 3 | | / 3 \/ 27 3 ________________ / / 3 \/ 27 3 ________________ | | / 3 \/ 27 3 ________________ / / 3 \/ 27 3 ________________ | | / 3 \/ 27 3 ________________ / / 3 \/ 27 3 ________________ | | / 3 \/ 27 3 ________________ / / 3 \/ 27 3 ________________ | | / / ____ / / / ____ | | / / ____ / / / ____ | | / / ____ / / / ____ | | / / ____ / / / ____ | | / / 172 4*\/ 29 / / / 172 4*\/ 29 | | / / 172 4*\/ 29 / / / 172 4*\/ 29 | | / / 172 4*\/ 29 / / / 172 4*\/ 29 | | / / 172 4*\/ 29 / / / 172 4*\/ 29 | | / 9*3 / --- + -------- / / 9*3 / --- + -------- | | / 9*3 / --- + -------- / / 9*3 / --- + -------- | | / 9*3 / --- + -------- / / 9*3 / --- + -------- | | / 9*3 / --- + -------- / / 9*3 / --- + -------- | |\/ \/ 27 3 \/ \/ \/ 27 3 | |\/ \/ 27 3 \/ \/ \/ 27 3 | | \/ \/ 27 3 \/ \/ \/ 27 3 | | \/ \/ 27 3 \/ \/ \/ 27 3 | |------------------------------------------------------------------- + ----------------------------------------------------------------------------------------------------------------------------------------------|*|------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------------------|*|- ------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------------------|*|- ------------------------------------------------------------------- + ----------------------------------------------------------------------------------------------------------------------------------------------| \ 2 2 / \ 2 2 / \ 2 2 / \ 2 2 /
$$\left(\frac{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}{2} + \frac{\sqrt{- 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}} - \frac{8}{3} + \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} + \frac{16}{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}}}{2}\right) \left(- \frac{\sqrt{- 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}} - \frac{8}{3} + \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} + \frac{16}{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}}}{2} + \frac{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}{2}\right) \left(- \frac{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}{2} - \frac{i \sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} + \frac{8}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}} + \frac{16}{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}}}{2}\right) \left(- \frac{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}{2} + \frac{i \sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} + \frac{8}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}} + \frac{16}{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}}}{2}\right)$$
=
-7
$$-7$$
-7
Respuesta rápida
[src]
_______________________________________________________________________________________________________________________________
/ ________________
/ / ____
/ 8 / 172 4*\/ 29 16 40
/ - - - 2*3 / --- + -------- + ------------------------------------------------------------------- + -----------------------
_________________________________________________________ / 3 \/ 27 3 _________________________________________________________ ________________
/ ________________ / / ________________ / ____
/ / ____ / / / ____ / 172 4*\/ 29
/ 4 / 172 4*\/ 29 40 / / 4 / 172 4*\/ 29 40 9*3 / --- + --------
/ - - + 2*3 / --- + -------- - ----------------------- / / - - + 2*3 / --- + -------- - ----------------------- \/ 27 3
/ 3 \/ 27 3 ________________ / / 3 \/ 27 3 ________________
/ / ____ / / / ____
/ / 172 4*\/ 29 / / / 172 4*\/ 29
/ 9*3 / --- + -------- / / 9*3 / --- + --------
\/ \/ 27 3 \/ \/ \/ 27 3
x1 = ------------------------------------------------------------------- + ----------------------------------------------------------------------------------------------------------------------------------------------
2 2
$$x_{1} = \frac{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}{2} + \frac{\sqrt{- 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}} - \frac{8}{3} + \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} + \frac{16}{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}}}{2}$$
_______________________________________________________________________________________________________________________________
/ ________________
/ / ____
/ 8 / 172 4*\/ 29 16 40
/ - - - 2*3 / --- + -------- + ------------------------------------------------------------------- + -----------------------
_________________________________________________________ / 3 \/ 27 3 _________________________________________________________ ________________
/ ________________ / / ________________ / ____
/ / ____ / / / ____ / 172 4*\/ 29
/ 4 / 172 4*\/ 29 40 / / 4 / 172 4*\/ 29 40 9*3 / --- + --------
/ - - + 2*3 / --- + -------- - ----------------------- / / - - + 2*3 / --- + -------- - ----------------------- \/ 27 3
/ 3 \/ 27 3 ________________ / / 3 \/ 27 3 ________________
/ / ____ / / / ____
/ / 172 4*\/ 29 / / / 172 4*\/ 29
/ 9*3 / --- + -------- / / 9*3 / --- + --------
\/ \/ 27 3 \/ \/ \/ 27 3
x2 = ------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------------------
2 2
$$x_{2} = - \frac{\sqrt{- 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}} - \frac{8}{3} + \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} + \frac{16}{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}}}{2} + \frac{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}{2}$$
_____________________________________________________________________________________________________________________________
/ ________________
/ / ____
/ 8 / 172 4*\/ 29 16 40
I* / - + 2*3 / --- + -------- + ------------------------------------------------------------------- - -----------------------
_________________________________________________________ / 3 \/ 27 3 _________________________________________________________ ________________
/ ________________ / / ________________ / ____
/ / ____ / / / ____ / 172 4*\/ 29
/ 4 / 172 4*\/ 29 40 / / 4 / 172 4*\/ 29 40 9*3 / --- + --------
/ - - + 2*3 / --- + -------- - ----------------------- / / - - + 2*3 / --- + -------- - ----------------------- \/ 27 3
/ 3 \/ 27 3 ________________ / / 3 \/ 27 3 ________________
/ / ____ / / / ____
/ / 172 4*\/ 29 / / / 172 4*\/ 29
/ 9*3 / --- + -------- / / 9*3 / --- + --------
\/ \/ 27 3 \/ \/ \/ 27 3
x3 = - ------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------------------
2 2
$$x_{3} = - \frac{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}{2} - \frac{i \sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} + \frac{8}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}} + \frac{16}{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}}}{2}$$
_____________________________________________________________________________________________________________________________
/ ________________
/ / ____
/ 8 / 172 4*\/ 29 16 40
I* / - + 2*3 / --- + -------- + ------------------------------------------------------------------- - -----------------------
_________________________________________________________ / 3 \/ 27 3 _________________________________________________________ ________________
/ ________________ / / ________________ / ____
/ / ____ / / / ____ / 172 4*\/ 29
/ 4 / 172 4*\/ 29 40 / / 4 / 172 4*\/ 29 40 9*3 / --- + --------
/ - - + 2*3 / --- + -------- - ----------------------- / / - - + 2*3 / --- + -------- - ----------------------- \/ 27 3
/ 3 \/ 27 3 ________________ / / 3 \/ 27 3 ________________
/ / ____ / / / ____
/ / 172 4*\/ 29 / / / 172 4*\/ 29
/ 9*3 / --- + -------- / / 9*3 / --- + --------
\/ \/ 27 3 \/ \/ \/ 27 3
x4 = - ------------------------------------------------------------------- + ----------------------------------------------------------------------------------------------------------------------------------------------
2 2
$$x_{4} = - \frac{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}{2} + \frac{i \sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} + \frac{8}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}} + \frac{16}{\sqrt{- \frac{40}{9 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}} - \frac{4}{3} + 2 \sqrt[3]{\frac{172}{27} + \frac{4 \sqrt{29}}{3}}}}}}{2}$$
x4 = -sqrt(-40/(9*(172/27 + 4*sqrt(29)/3)^(1/3)) - 4/3 + 2*(172/27 + 4*sqrt(29)/3)^(1/3))/2 + i*sqrt(-40/(9*(172/27 + 4*sqrt(29)/3)^(1/3)) + 8/3 + 2*(172/27 + 4*sqrt(29)/3)^(1/3) + 16/sqrt(-40/(9*(172/27 + 4*sqrt(29)/3)^(1/3)) - 4/3 + 2*(172/27 + 4*sqrt(29)/3)^(1/3)))/2
Respuesta numérica
[src]
x1 = -0.626615337908865 + 2.14112063462735*i
x2 = -0.626615337908865 - 2.14112063462735*i
x3 = 1.96792216657326
x4 = -0.714691490755533
x4 = -0.714691490755533