(7 m-8 n)^{2}+(7 m+8 n)^{2} – InterviewSolution

1.	(7 m-8 n)^{2}+(7 m+8 n)^{2}
Answer» We know(a+b)² + (a-b)²2 (a² + b²) So,(7m-8n)² + (7m + 8n)²2( (7m)² + (8n)²)2( 49m² + 64n²)98m² + 128n²

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