# How to factor 4th degree polynomials

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• June 14th 2009, 05:01 PM
hypermonkee
How to factor 4th degree polynomials
How do you factor
x^4+2x^2-8=0 ?
all steps please and thanks!
• June 14th 2009, 05:10 PM
Jhevon
Quote:

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?