what should be added to the following expressions to make it perfect square : 112xy + 64y^2 ?
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Step-by-step explanation:
64y²= (8y)²
112xy = 2*8y*7x
64y²+112xy is in the form a2+2ab, a=8y, b=7x to make it perfect square add (7x)²=49x²
49x² should be added
then 64x²+112xy+49y² = (8x+7y)²
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