# Thread: How to factor 4th degree polynomials

1. ## How to factor 4th degree polynomials

How do you factor
x^4+2x^2-8=0 ?
all steps please and thanks!

2. Originally Posted by hypermonkee
How do you factor
x^4+2x^2-8=0 ?
all steps please and thanks!
let $a = x^2$, then you have

$a^2 + 2a - 8 = 0$

think you can take it from here?