9a(3a-5a)-12a^2(3a-5a)
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Step-by-step explanation:
Your answer is
9a(3a-5a)-12a^2(3a-5a)
(9a-12a^2) ( 3a-5a)
(3a) ( 3-4a) ( 3a-5a)
hence factorise
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