Question

evaluate bracket 51 square - 49 square bracket using suitable identity​

Answer 1

(51^2 - 49^2)

= (51+49) (51-49)

=100 *2

=200... the identity used is

aSqaure -bSquare= (a+b)(a-b)

Answer 2

$51 ^{2} - 49 ^{2} \\ by \: using \: the \: identity \: \\ x ^{2} - y ^{2} = (x \ + y)(x - y) \\ {51}^{2} - {49 }^{2} = (51 + 49)(51 - 49) \\ = (100)(2) \\ = 200$

your answer is 200

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