Math, asked by priyansh8239, 1 year ago

9 X square + 42 X + 49 - 84 X factorise using suitable grouping

Answers

Answered by prabhakp813

8

Answer:

x=21/7,21/7

Step-by-step explanation:

9x²+42x-84x+49 ⇒ 9x²-42x+49=0 ⇒ (9x-21)(9x-21) ⇒ x=21/9,21/9

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