evaluate (2x/7-7y/4)^2
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Step-by-step explanation:
( 7/2x− 4/7y )^2
Using,
(a−b)^2=a^2 −2ab+b^2
=(7/2x )^2−2(2x /7)(7x/4) +(7y/4)²
=4x^2−xy+16/49y^2
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