Math, asked by hardik4461, 2 months ago

Sampling fy:
(3x+7)2 -84x = (3x-7)2

Answers

Answered by bagkakali

3

Answer:

(3x+7)^2-84x=(3x-7)^2

=> (3x+7)^2-(3x-7)^2=84x

LHS-

={(3x+7)+(3x-7)}{(3x+7)-(3x-7)}

=(3x+7+3x-7)(3x+7-3x+7)

=6x.14

=84x(RHS)

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