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1) 5ac - 6bd + 5ad -6bc
2) a(5a - 4b) - 10a +8b
3) 4ab - 6cd - 12ad + 2bc
1) 5ac - 6bd + 5ad -6bc
2) a(5a - 4b) - 10a +8b
3) 4ab - 6cd - 12ad + 2bc
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1) 5ac-6bd+5ad-6bc=5ac+5ad-6bd-6bc=5a(c+d)-6b(d+c)=(5a-6b)(c+d)2) a(5a-4b)-10a+8b=a(5a-4b)+2(5a-4b)=(a+2)(5a-4b)
3) 4ab-6cd-12ad+2bc=4ab+2bc-6cd-12ad=2b (2a+c) - 6d(c+2a)=(2b-6d)(2a+c)=2(b-3d)(2a+c)