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OpenStudy (anonymous):
Simplify the sum. 4/m+9 + 5/m^2-81 a. 9 / (m-9)(m+9) b. 4m-31/ (m-9)(m+9) c. 9 / m^2+m-72 d. 4m + 41 / (m-9)(m+9)
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OpenStudy (raden):
hint : for the first fraction 4/m+9 , multiply by (m-9)/(m-9)
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