Math, asked by mkamranalisiddique56, 9 months ago

show that (7a - 5b) + 140ab = (7a + 5b)²

Answers

Answered by Anonymous

9

Given (7a - 5b)² + 140ab = (7a + 5b)²

rearranging the given equation we get

=> (7a - 5b)² - (7a + 5b)² = -140ab

taking LHS

= 49a² - 70ab + 25b² - 49a² - 70ab - 25b²

= - 70ab - 70ab

= - 140ab

= RHS

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