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4 May, 22:15

Simplify the sum 4/m+9 + 5/m2 - 81

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Answers (2)
  1. 4 May, 22:43
    0
    Factor

    m^2-81 = (m-9) (m+9)

    multiply other equation by (m-9) / (m-9)

    4 (m-9) / (m^2-81) + 5 / (m^2-81)

    (4 (m-9) + 5) / (m^2-81)

    (4m-36+5) / (m^2-81)

    (4m-31) / (m^2-81)
  2. 5 May, 00:29
    0
    The answer to the question is 4m-31 / (m-9) (m+9)
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