1/2{(a+b)² +(a-b)² }=কত?
Solution
Correct Answer: Option A
1/2{(a+b)² +(a-b)² }
=1/2(a² +2ab+b² +a² -2ab+b² )
=(2a² +2b² )
=a² +b²
=1/2(a² +2ab+b² +a² -2ab+b² )
=(2a² +2b² )
=a² +b²
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