How does one factor this crazy expression?

y^4 - (p+q) * y^3 + [p^2*q + p(q^2)]*y minus p^2*q^2

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- October 28th 2013, 06:11 AMnycmathFactor this Expression
How does one factor this crazy expression?

y^4 - (p+q) * y^3 + [p^2*q + p(q^2)]*y minus p^2*q^2 - October 28th 2013, 10:59 AMebainesRe: Factor this Expression
You want to find roots of the equation. Hint: see what happens if y=p or y=q. Once you find a root or two you can factor using long division.