Factorise it
(With explanation)
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(2a-3 +7b) (2a-3b-7b)
Step-by-step explanation:
=(4a^2 -12a +9) - 7b^2
={2a -3)^2 - (7b)^2
=(2a-3 +7b) (2a-3-7b)
note:- (^) is square sign. eg:- 4a^2 means 4a square
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