SOLUTION: Factor: x^4-13x^2+4 (I do not know how to put this on a formula plotting system so this is the best way for me to ask the question). **I tried to use the integral factor th

Question 536920: Factor:
x^4-13x^2+4 (I do not know how to put this on a formula plotting system so this is the best way for me to ask the question).
**I tried to use the integral factor theorem to find the factors of 4 and see which one makes the above equal to zero and go from there. But none of those factors make it equal to zero. So how would I factor this expression?
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
I would expect that this problem was meant to say factor
In that case, since you know that
your first step would be

From there on it does not get too pretty
and

So you could say

However it gets much uglier with .
The solutions to
are
They are both positive, so we would end up with

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