Factorise:9(2a-3b)^2 - 12(2a-3b)
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Answer:
3(2a-3b)(6a-9b-4)
Step-by-step explanation:
9(2a-3b)^2 - 12(2a-3b)
=3(2a-3b)[3(2a-3b)-4]
=3(2a-3b)(6a-9b-4)
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