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algebra

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parking lot had a length that is 7 yards greater than thre width. the area of the lot is 450 square yards. what is the length and width?

  • algebra - ,

    x(x+7) = 450
    x^2 + 7 x - 450 = 0

    x = [ - 7 +/- sqrt (49+1800) ] / 2

    x = [ - 7 +/- sqrt (1849) ] / 2

    x = [ -7 +/- 43 ]/2

    x = 18
    x+7 = 25

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