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Question
Simplify combining like terms: 3a - 2b - ab - (a - b + ab) + 3ab + b - a
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Solution
3a - 2b - ab - (a - b + ab) + 3ba + b - a
= 3a - 2b - ab - a + b - ab + 3ab + b - a
= 3a - a - a - 2b + b + b - ab - ab + 3ab
= a (3 - 1 - 1) + b (-2 + 1 + 1) + ab (-1 -1 + 3)
= a + ab
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