(a+b) ²_4ab= .................
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I think (a+b)²-4ab=(ab)² ...
LHS-. (a-b)²= a²+b²-2ab
RHS- (a+b)²-4ab
= a²+b²+2ab-4ab
= a²+b²-2ab.
Since LHS = RHS..
LHS-. (a-b)²= a²+b²-2ab
RHS- (a+b)²-4ab
= a²+b²+2ab-4ab
= a²+b²-2ab.
Since LHS = RHS..
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