Question

without squaring find the value of (77)²- (76)²​

Answer 1

Since, a²-b²=(a+b) (a-b)

So, 77²-76²=(77+76)(77-76)

=>77²-76²=( 153)(1)

153

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Answer 2

Step-by-step explanation:

$({77})^{2} - ({76})^{2} \\ = {a}^{2} - {b}^{2} =(a - b)(a + b) \\ (77 - 76)(77 + 76)$

answer=(1) (135)