El profesor se sorprenderá mucho al ver tu solución correcta😉
2 (7*x + 1)*(x - 3) + 20*(x - 1)*(x + 1) = 3*(3*x*2) + 13
a*x^2 + b*x + c = 0
D = b^2 - 4 * a * c =
(-20)^2 - 4 * (-81) * (-36) = -11264
x1 = (-b + sqrt(D)) / (2*a)
x2 = (-b - sqrt(D)) / (2*a)
suma
____ ____ 10 16*I*\/ 11 10 16*I*\/ 11 - -- - ----------- + - -- + ----------- 81 81 81 81
=
-20 ---- 81
producto
/ ____\ / ____\ | 10 16*I*\/ 11 | | 10 16*I*\/ 11 | |- -- - -----------|*|- -- + -----------| \ 81 81 / \ 81 81 /
=
4/9
4/9
____ 10 16*I*\/ 11 x1 = - -- - ----------- 81 81
____ 10 16*I*\/ 11 x2 = - -- + ----------- 81 81
x2 = -10/81 + 16*sqrt(11)*i/81
x1 = -0.123456790123457 - 0.655135761057857*i
x2 = -0.123456790123457 + 0.655135761057857*i
x2 = -0.123456790123457 + 0.655135761057857*i