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Simplify : 81 X 81 + 68 X 68 - 2 x 81 X 68.

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Simplify : 81 X 81 + 68 X 68 - 2 x 81 X 68.

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1 Answer

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Best answer

Given exp 

= (81)2 + (68)2 – 2 x 81 x 68 

= a2 + b2 – 2ab, Where a = 81,b = 68 

= (a-b)2 

= (81 –68)2 

= (13)2 

= 169.

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