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| 1. |
3 a - 2 b - a b - ( a - b + a b ) + 3 a b + b - a |
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Answer» 3a-2b-ab-(a-b+ab)+3ab+b-a =3a-2b-ab-a+b-ab+3ab+b-a =3a-a-a-2b+b+b-ab-ab+3ab =3a-2a-2b+2b-2ab+3ab =a+ab=a(1+b) |
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