how too

[kkiceman14]

how do i factor this:

x^4-13x^2+36[/i]

 

[tkhunny]

How would you factor y^2-13y+36?

That's a really big clue.

 

[kkiceman14]

got it

(y-4)(y-9)

y=4,9

 

[Denis]

got it
(y-4)(y-9)
y=4,9

That's good, icer, but you're not finished...x = ?