Math, asked by aayushjakkar, 1 year ago

show that (3x+7)-84x=(3x-7)

Answers

Answered by Anonymous
13

Answer:


Step-by-step explanation:

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


3x-84x-3x= -7-7


84x=-14


x=-14/84


x=-6


Answered by Anonymous
23

☆ (3x + 7)² - 84x = (3x - 7)²

➥ (3x)² + 2 × 3x × 7 + (7)² - 84x

➥ 9x² + 42x + 49 - 84x

➥ 9x² - 42x + 49 = (3x - 7)²

➥ R.H.S.

☆ Hence proved.

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