verify the identity (a+b)whole square =a square+2ab+b square geometrically by taking
1) a=2 units b=4units
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a=2
b=4
ans: 2*2+2*2*4+4*4=4+16+16=36
b=4
ans: 2*2+2*2*4+4*4=4+16+16=36
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