Factor (x-y)^2 - 9 (2x+y)^2

Mathematics
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Factor (x-y)^2 - 9 (2x+y)^2

Sep 29th, 2014

Factor (x-y)^2 - 9 (2x+y)^2

(a+b)^2 =a^2+b^2+2ab

(a-b)^2=a^2+b^2-2ab

x^2+y^2-2xy -9(4x^2+y^2+4xy)

x^2+y^2-2xy-36x^2-9y^2-36xy

-35x^2-8y^2-38xy


Sep 29th, 2014

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Sep 29th, 2014
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Sep 29th, 2014
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