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21-04-2015
Mathematics

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x^{2} +16xy+63y ^{2}

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21-04-2015

[tex]x^{2} +16xy+63y ^{2} \\ = x^{2} +16xy+64y ^{2}-y ^{2} \\ = (x+8y)^{2}-y ^{2} \\ =(x+8y+y)(x+8y-y) \\ =(x+9y)(x+7y)[/tex]

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