SOLUTION: A rectangular window pane is 12 square feet. The width of the window pane is 1 foot less than its length. What is the width of the window pane?

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Question 877024: A rectangular window pane is 12 square feet. The width of the window pane is 1 foot less than its length. What is the width of the window pane?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
w for width
L for length
w=-1+L, translated words to number description; and wL=12. Simply substitute...
%28L-1%29L=12
L%5E2-L=12
L%5E2-L-12=0
%28L-4%29%28L%2B3%29=0
Accept L=4 and reject L=-3.
Conitnue from there.

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

A rectangular window pane is 12 square feet. The width of the window pane is 1 foot less than its length. What is the width of the window pane?


Let width be W

Then length = W + 1

Therefore, W(W + 1) = 12

W%5E2+%2B+W+-+12+=+0

(W - 3)(W + 4) = 0

W, or width = highlight_green%283%29 feet          OR         W  = - 4 (ignore)

You can do the check!! 



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