SOLUTION: Factor the polynomial in quadratic form.

Question 573613: Factor the polynomial in quadratic form.
Answer by unlockmath(1688) (Show Source): You can put this solution on YOUR website!
Hello,
With this x^4+x^2-20 let u equal x^2 so we have:
u^2+u-20
Factor this to:
(u+5)(u-4)
Replace the u with x^2 to get
(x^2+5)(x^2-4)
Make sense?
RJ
www.math-unlock.com