Question

factorise using suitable grouping 9x^2+42x+49-84x ​

Answer 1

9x^2+42x+49-84x

9x^2+42x-84x+49

9x^2-42x+49

(3x)^2-2×3x×7+(7)^2

so(3x-7)^2

Answer 2

Answer:

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x=7/3

solution:- in the attachment

hope my handwriting is clear enough to understand.!!

have a nice day ahead