SOLUTION: A length of a window is 3 feet shorter than twice the width. If the area had 77 square meters, find the perimeter of the window.

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Question 880718: A length of a window is 3 feet shorter than twice the width. If the area had 77 square meters, find the perimeter of the window.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
L=2w-3 and wL=77.

w%282w-3%29-77=0
2w%5E2-3w-77=0
w=%283%2B-+sqrt%289%2B4%2A2%2A77%29%29%2F4, only the positive square root meaningful.
w=%283%2Bsqrt%28625%29%29%2F4
w=%283%2B25%29%2F4
highlight%28w=7%29
-
L=2%2A7-3
highlight%28L=11%29