Rob D.

asked • 01/28/15

20x^2-100xy+125y^2

Factor as completely as possible. If unfactorable, indicate that the polynomial is prime.
20x^2-100xy+125y^2

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Mark M. answered • 01/29/15

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20x2 - 100xy + 125y2       Always start with GCF if possible
5(4x2 - 20xy + 25y2)        This is a perfect square trinomial
5(2x - 5)2
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Michael W.

Except you lost the "y" part of the perfect square. :) So it's the square of (2x - 5y), not just 2x - 5.
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01/29/15

Mark M.

Michael,
 
Thank you!
 
Mark
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01/29/15

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