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14 August, 01:59

What is the solution of - 8/2y-8=5/y+4-7y+8/y^2-16

y = - 4

y = - 2

y = 4

y = 6

+5
Answers (1)
  1. 14 August, 02:52
    0
    (-8) / (2y-8) = (5 / (y+4)) - 7y + (8 / (y^2-16))

    (-4) / (y-4) = (5 / (y+4)) - 7y + (8 / (y+4) (y-4))

    ((-4) (y+4)) / ((y+4) (y-4)) = ((5 (y-4)) / (y+4) (y-4)) - (7y (y+4) (y-4)) / (y+4) (y-4)) + (8 / (y+4) (y-4))

    (-4 (y+4)) = (5 (y-4)) - (7y (y+4) (y-4)) + 8

    -4y-16=5y-20 - (7y (y^2-16)) + 8

    -4y-16=5y-20-7y^3+112y+8

    -4y-16=117y-7y^3-12

    -4 = (121-7y^2) (y)

    None of these choices would be equal to - 4
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