subtract 6a²b-6ab+7b from 9a²b²+3ab-8b
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Step-by-step explanation:
subtract 6a²b-6ab+7b from 9a²b²+3ab-8b
9a²b+3ab-8b-(6a²b-6ab+7b)
= 9a²b+3ab-8b-6a²b+6ab-7b
= 9a²b-6a²b+3ab+6ab-8b-7b
= 3a²b+9ab-15b
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