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2 April, 23:47

Which equation is equivalent to sqrt x^2 + 81 = x + 10

A. x+10 = x+10

B. X+9 = x^2 + 20x + 100

C. x^2 + 81 = x^2 + 100

D. x^2 + 81 = x^2 + 20x + 100

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Answers (1)
  1. 3 April, 01:53
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    sqrt x^2 + 81 = x + 10

    x^2 + 81 = (x+10) ^2

    x^2 + 81 = x^2 + 20x + 100

    so answer is

    D. x^2 + 81 = x^2 + 20x + 100
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