Posted by **deborah** on Tuesday, January 23, 2007 at 11:51am.

complete factorization

y^4-25y^2+144

(^) denotes following number is Power

y^4 - 25y^2 + 144

You might try replacing y^2 with x. Therefore your statement becomes:

x^2 - 25x + 144

...which is easier to factor.

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