Question

what are the zeros of f(x)=2x^4-2x^2-40?

Answer 1

Let the function equial zero, then solve for x.
Try factoring first.

Answer 2

Zeros occur where f(x) = 0.

f(x)=2x^4-2x^2-40

Let f(x) = 0

0 = 2x^4-2x^2-40

0 = 2*( x ^4 - x^2 - 20)

@charjay Factor ( x ^4 - x^2 - 20) and post what you get, okay?