Math

The length of a rectangle is three centimeters less than the width. If the area of the rectangle is 54cm^2 , find the dimensions of the rectangle

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  1. width ---- x cm
    then length = x-3 xm

    x(x-3) = 54
    x^2 - 3x - 54 = 0
    (x-9)(x+6) = 0
    x = 9 or x = -6, but the width couldn't be negative.

    the rectangle is 9 cm by 6 cm

    or, simply think this:
    what 2 numbers multiply to get 54 and have a difference of 3 ??

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