What are all of the real roots of the following polynomial? f(x) = x^4 -24x^2 - 25 a. -1 or 1 b. -5 or 5 c. -5, -1, 1, or 5 d. -5 or -1 ?

For this case we have the following function:

We make a change of variable:

So, we have:

We apply the resolver:

We have two roots:

Returning the change:

Give the imaginary roots.

Real roots

step-by-step explanation:

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x