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Twice the Square of a certain whole number added to 3 times the number gives 90. Find the number.

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  1. 2x^2 + 3x = 90

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    Ms. Sue

  2. 2x^2+3x=90
    2x^2+3x-90=0

    (2x+15 )(x-6)=0
    x = -7.5 or x = 6

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