sqrt(3)*(x^3-1)+i*(x^3+1)=0 la ecuación
El profesor se sorprenderá mucho al ver tu solución correcta😉
Solución
/pi\ /pi\
x1 = - I*sin|--| + cos|--|
\9 / \9 /
$$x_{1} = \cos{\left(\frac{\pi}{9} \right)} - i \sin{\left(\frac{\pi}{9} \right)}$$
/pi\ / /pi\ ___ /pi\\ ___ /pi\
cos|--| |sin|--| \/ 3 *cos|--|| \/ 3 *sin|--|
\9 / | \9 / \9 /| \9 /
x2 = - ------- + I*|------- - -------------| - -------------
2 \ 2 2 / 2
$$x_{2} = - \frac{\cos{\left(\frac{\pi}{9} \right)}}{2} - \frac{\sqrt{3} \sin{\left(\frac{\pi}{9} \right)}}{2} + i \left(- \frac{\sqrt{3} \cos{\left(\frac{\pi}{9} \right)}}{2} + \frac{\sin{\left(\frac{\pi}{9} \right)}}{2}\right)$$
/pi\ / /pi\ ___ /pi\\ ___ /pi\
cos|--| |sin|--| \/ 3 *cos|--|| \/ 3 *sin|--|
\9 / | \9 / \9 /| \9 /
x3 = - ------- + I*|------- + -------------| + -------------
2 \ 2 2 / 2
$$x_{3} = - \frac{\cos{\left(\frac{\pi}{9} \right)}}{2} + \frac{\sqrt{3} \sin{\left(\frac{\pi}{9} \right)}}{2} + i \left(\frac{\sin{\left(\frac{\pi}{9} \right)}}{2} + \frac{\sqrt{3} \cos{\left(\frac{\pi}{9} \right)}}{2}\right)$$
x3 = -cos(pi/9)/2 + sqrt(3)*sin(pi/9)/2 + i*(sin(pi/9)/2 + sqrt(3)*cos(pi/9)/2)
Suma y producto de raíces
[src]
/pi\ / /pi\ ___ /pi\\ ___ /pi\ /pi\ / /pi\ ___ /pi\\ ___ /pi\
cos|--| |sin|--| \/ 3 *cos|--|| \/ 3 *sin|--| cos|--| |sin|--| \/ 3 *cos|--|| \/ 3 *sin|--|
/pi\ /pi\ \9 / | \9 / \9 /| \9 / \9 / | \9 / \9 /| \9 /
- I*sin|--| + cos|--| + - ------- + I*|------- - -------------| - ------------- + - ------- + I*|------- + -------------| + -------------
\9 / \9 / 2 \ 2 2 / 2 2 \ 2 2 / 2
$$\left(\left(- \frac{\cos{\left(\frac{\pi}{9} \right)}}{2} - \frac{\sqrt{3} \sin{\left(\frac{\pi}{9} \right)}}{2} + i \left(- \frac{\sqrt{3} \cos{\left(\frac{\pi}{9} \right)}}{2} + \frac{\sin{\left(\frac{\pi}{9} \right)}}{2}\right)\right) + \left(\cos{\left(\frac{\pi}{9} \right)} - i \sin{\left(\frac{\pi}{9} \right)}\right)\right) + \left(- \frac{\cos{\left(\frac{\pi}{9} \right)}}{2} + \frac{\sqrt{3} \sin{\left(\frac{\pi}{9} \right)}}{2} + i \left(\frac{\sin{\left(\frac{\pi}{9} \right)}}{2} + \frac{\sqrt{3} \cos{\left(\frac{\pi}{9} \right)}}{2}\right)\right)$$
/ /pi\ ___ /pi\\ / /pi\ ___ /pi\\
|sin|--| \/ 3 *cos|--|| |sin|--| \/ 3 *cos|--||
| \9 / \9 /| | \9 / \9 /| /pi\
I*|------- + -------------| + I*|------- - -------------| - I*sin|--|
\ 2 2 / \ 2 2 / \9 /
$$i \left(- \frac{\sqrt{3} \cos{\left(\frac{\pi}{9} \right)}}{2} + \frac{\sin{\left(\frac{\pi}{9} \right)}}{2}\right) - i \sin{\left(\frac{\pi}{9} \right)} + i \left(\frac{\sin{\left(\frac{\pi}{9} \right)}}{2} + \frac{\sqrt{3} \cos{\left(\frac{\pi}{9} \right)}}{2}\right)$$
/ /pi\ / /pi\ ___ /pi\\ ___ /pi\\ / /pi\ / /pi\ ___ /pi\\ ___ /pi\\
| cos|--| |sin|--| \/ 3 *cos|--|| \/ 3 *sin|--|| | cos|--| |sin|--| \/ 3 *cos|--|| \/ 3 *sin|--||
/ /pi\ /pi\\ | \9 / | \9 / \9 /| \9 /| | \9 / | \9 / \9 /| \9 /|
|- I*sin|--| + cos|--||*|- ------- + I*|------- - -------------| - -------------|*|- ------- + I*|------- + -------------| + -------------|
\ \9 / \9 // \ 2 \ 2 2 / 2 / \ 2 \ 2 2 / 2 /
$$\left(\cos{\left(\frac{\pi}{9} \right)} - i \sin{\left(\frac{\pi}{9} \right)}\right) \left(- \frac{\cos{\left(\frac{\pi}{9} \right)}}{2} - \frac{\sqrt{3} \sin{\left(\frac{\pi}{9} \right)}}{2} + i \left(- \frac{\sqrt{3} \cos{\left(\frac{\pi}{9} \right)}}{2} + \frac{\sin{\left(\frac{\pi}{9} \right)}}{2}\right)\right) \left(- \frac{\cos{\left(\frac{\pi}{9} \right)}}{2} + \frac{\sqrt{3} \sin{\left(\frac{\pi}{9} \right)}}{2} + i \left(\frac{\sin{\left(\frac{\pi}{9} \right)}}{2} + \frac{\sqrt{3} \cos{\left(\frac{\pi}{9} \right)}}{2}\right)\right)$$
___
1 I*\/ 3
- - -------
2 2
$$\frac{1}{2} - \frac{\sqrt{3} i}{2}$$
x1 = -0.17364817766693 + 0.984807753012208*i
x2 = -0.766044443118978 - 0.642787609686539*i
x3 = 0.939692620785908 - 0.342020143325669*i
x3 = 0.939692620785908 - 0.342020143325669*i