Homework Help: math-factoring

Posted by racheal on Tuesday, September 21, 2010 at 8:44am.

(test next period)
PLEASE HELP!!

x4-13X2+36

how DO YOU FACTOR THIS I TRIED EVERYTHING HELP!!!

math-factoring - MathMate, Tuesday, September 21, 2010 at 8:58am
Put y=x²
then
x⁴-13x²+36
=y²-13y+36
=y(y-9)-4(y-9)
=?
math-factoring - racheal, Tuesday, September 21, 2010 at 9:10am
Why didnt i think of that...GENIUS!!THANKS A MILLION TIMES!!

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