expand the following using suitable indentities (4× -7 by 2 y) ²
pls give the formula step by step
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Step-by-step explanation:
(4x - 7y/2)² = (4x)²-2(4x)(7y/2)+(7y/2)²
[ using identity (a-b)²=a²-2ab+b²]
=16x² - 28xy + 49y²/4
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