Prove that a-b whole square = a+b whole square - 4ab
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Solution :
RHS = ( a + b )² - 4ab
= a² + b² + 2ab - 4ab
= a² + b² - 2ab
= ( a - b )²
= RHS
••••
RHS = ( a + b )² - 4ab
= a² + b² + 2ab - 4ab
= a² + b² - 2ab
= ( a - b )²
= RHS
••••
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