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Question
factorise : 8(2a + 3b)3 - 12(2a + 3b)2
Solution
8(2a + 3b)3 - 12(2a + 3b)2
= 4 (2a + 3b)2 [2 (2a + 3b) - 3]
= 4 (2a + 3b)2 [4a + 6b - 3]
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