Question 157573: rectangle where length is one more unit than width ,,the area is 30 square units ,,,what are the length and width dimensions,,,,,neeed the equation
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! rectangle where length is one more unit than width ,,the area is 30 square units ,,,what are the length and width dimensions,,,,,neeed the equation
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Area = Length x Width, or
A = L*W
so L*W = 30, and L = W+1
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A=LW eqn 1
L=W+1 eqn 2
Sub into eqn for for L
A = (W+1)*W = 30
W^2 + W = 30
W^2 + W -30 = 0
Factor it
(W + 6)*(W-5) = 0
W = -6
W = 5
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A rectangle -6 by -5 makes no sense, so ignore that one.
W = 5
L = 6
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