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2 votes
(b^2 +8b-9) - (11b^2 -4b+7)

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5 votes
Use cymath it gives you the answer and shows you how to do it sel by step
User Martin Kouba
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7.4k points
6 votes

I believe this would be -10b^2+12b-16

Hope this helps!

User Chris Moschini
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7.7k points
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