Math, asked by shorya270, 11 months ago

Factorise : ( 5 b - 4 ) ^ 2 - (5 b + 4 ) ^ 2

Answers

Answered by sanketj

0

(5b - 4)² - (5b + 4)²

$= (5b - 4 + 5b + 4)(5b - 4 - (5b + 4))$

... a² - b² = (a + b)(a - b)

$= (10b)( - 8) \\ = - 80b$

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