SOLUTION: dimensions of a rectangle if the width is 3 meters less than the length and the area is 40 cubic meters

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Question 633835: dimensions of a rectangle if the width is 3 meters less than the length and the area is 40 cubic meters
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
L*W=AREA.
L=X
W=X-3
X*(X-3)=40
X^2-3X-40=0
(X-8)(X+5)=0
X-8=0
X=8 ANS. FOR THE LENGTH.
W=8-3=5 ANS. FOR THE WIDTH.
PROOF:
8*5=40
40=40