Question

Factorize : 9 (2a - b) squared- 4 ( 2a - b ) class 9 maths pls answer this fast l will mark u as brainiest

Answer 1

Answer:

Given 9(2a - b)^2 - 4(2a - b) -13

= > 9(2a - b)(2a - b) + 9(2a - b) - 13(2a - b) - 13

= > 9(2a - b)[(2a - b) + 1] - 13[(2a - b) + 1]

= > (2a - b + 1)(18a - 9b - 13).

Answer 2

9(2a-b)^2 - 4(2a-b)

9(2a)^2+(b)^2 - 2a×a×b - 8a-4b

9×(4a^2+b^2 -2a^2b) - 8a-4b

36a^2+9b^2-18a^2b -8a- 4b

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