(5m-7n)sq.+(5m+7n)sq. find the answer fast
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Answered by
19
(5m-7n)² + (5m+7n)²
= 25m²+49n²-70mn+25m²+49n²+70mn
=50m²+98n²
Answered by
8
(5m-7n)²+(5m+7n)²
((5m)²-2mn +(7n)²) +((5m)²+2mn+(7n)²)
Then,
- 2mn cut by +2mn
2((5m)²+(7n)²)
((5m)²-2mn +(7n)²) +((5m)²+2mn+(7n)²)
Then,
- 2mn cut by +2mn
2((5m)²+(7n)²)
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