SOLUTION: A rectangle's width is 5 feet less than its length. If the area of the rectangle is 546 square feet, what is its length, in feet?

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Question 762508: A rectangle's width is 5 feet less than its length. If the area of the rectangle is 546 square feet, what is its length, in feet?
Answer by kibauu(44) About Me  (Show Source):
You can put this solution on YOUR website!
we say that
length = l
width = l-5 ---> cuz the width is 5 feet less than its length
rectangle = length x width
546=+l+x+%28l-5%29
546=+l%5E2-+5l
or we can say
l%5E2+-+5l+-546=0
so, you can find the value of l
if you struggle to find l, use this solve
http://www.algebra.com/algebra/homework/quadratic/solver.mpl