what should be added to 4x2 + 4xy + y2 to obtain (2x - y)2
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Answer:
4x-4y-4x^2-4xy-y^2
Step-by-step explanation:
{2(2x-y)}-(4x^2+4xy+y^2)
=4x-4y-4x^2-4xy-y^2
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