Computer Science, asked by khushi998823, 3 months ago

(3x. +7)² -84x=(3x -7)² please solve step step by step..

Answers

Answered by rupesh031978

1

Answer:

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

(3x)^2+7^2+2×3x×7 -84x = (3x-7)^2

9x^2+49+42x-84x = (3x-7)^2

9x^2+49-42x = (3x-7)^2

(3x)^2+7^2-2×3x×7 = (3x-7)^2

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

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