Question

A soma das raízes de f(x)=(x^3-8)(x^4-256) é:

Answer 1

f(x) = (x³-8)(x⁴-256)

x³ - 8 = 0
x³ = 8
x = ∛8
x = 2

x⁴ - 256 = 0
x = ⁴√256
x' = 4
x" = -4

- 4 + 4 + 2 = 2

=)