Question 120353: the length of a rectangle is 3 more than its width, if the area is 88 square inches, find the value of the length and width of the rectangle.
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! The length of a rectangle is 3 more than its width:
:
Let x = the width
then
(x+3) = the length
:
if the area is 88 square inches,
W * L = 88
x(x+3) = 88
:
find the value of the length and width of the rectangle.
x^2 + 3x = 88; multiplied the width * length
:
x^2 + 3x - 88 = 0; our old friend, the quadratic equation
:
Factors to:
(x+11)(x-8) = 0
:
x = + 8, it's the positive solution that we want here.
:
Width = 8, then Length: 8 + 3 = 11 and the area is 88 sq/in, right?
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