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March 28, 2017

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(20-r)^(1/2)= r

  • Algebra 2 - ,

    assuming you want to solve for r, square both sides to get

    20-r = r^2
    r^2 + r - 20 = 0
    (r+5)(r-4) = 0

    and it's all downhill from there.
    Just remember: √25 = 5, not -5

  • Algebra 2 - ,

    Thank you!

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