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13 March, 14:16

X^2-2y/y when x=20 and y=x/2

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Answers (2)
  1. 13 March, 15:48
    0
    398

    Step-by-step explanation:

    x^2=400

    substitute for y, 2y/y = (2*x/2) / (x/2) = x / (x/2) = x * (2/x) = 2

    400-2=398
  2. 13 March, 16:43
    0
    I believe its 398
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