Question

what should be added to the following expressions to make it perfect square : 112xy + 64y^2 ?​

Answer 1

Answer:

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Answer 2

$112xy + 64y {}^{2} \\ 112xy + (8y) {}^{2} \\ 2 (7x)(8y) \\ 2ab = - 112xy \\ a {}^{2} - 2ab {}^{2} + b {}^{2} =( a - b) {}^{2} \\ where \: a = 7x \: and \\ b = - 8y \\ (7x - 8y) {}^{2}$

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