Question

1.- EFECTUAR: ( x+2) (x-2) (x^2+2^2) +16

Answer 1

(x + 2) (x - 2) (x^2 + 2^2) + 16 = 0
(x^2 - 2^2)(x^2 + 2^2) + 16 = 0
(x^4 - 2^4) + 16 = 0
x^4 -16 + 16 = 0
x^4 = 0

x1 = x2 = x3 = x4 = 0