SOLUTION: the length of a rectangular lot is 4m longer than the width. if the area of the lot is 12 m, what are its dimensions

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Question 1179740: the length of a rectangular lot is 4m longer than the width. if the area of the lot is 12 m, what are its dimensions
Answer by ikleyn(52812) About Me  (Show Source):
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the length of a rectangular lot is 4m longer than the width. if the area of the lot is 12 highlight%28cross%28m%29%29 square meters,
what are its dimensions
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ANSWER.   6 meters by 2 meters.



EXPLANATION.


The equation is


    x*(x+4) = 12

    x^2 + 4x - 12 = 0

    (x+6)*(x-2) = 0


The roots of the equation are  x= -6  and  x= 2.


Of the two roots, we chose the positive one   x= 2 meters,

which gives the answer above.

Solved.