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Find the sum of 9r^2+4r-7) + (3r^2-3r

Find the sum of 9r^2+4r-7) + (3r^2-3r
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Find the sum of 9r^2+4r-7) + (3r^2-3r

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User Yabin Ya
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1 Answer

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Answer

12r2 +r − 7

Explanation:

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User Serita
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