Question

.
-x^4+25x^2 factor completely.

Answer 1

-x^2(x + 5)(x - 5)

Explanation:

x^2 is common to both terms of -x^4+25x^2:

x^2(-x^2 + 25)

and the binomial factor can be factored further:

x^2(x + 5)(-x + 5) or

-x^2(x + 5)(x - 5)