SOLUTION: A rectangle whose length is 3cm more than its width has an area of 40 square centimeters. Find the length and the width of this rectangle.

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Question 250297: A rectangle whose length is 3cm more than its width has an area of 40 square centimeters. Find the length and the width of this rectangle.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
L=W+3
LW=40
(W+3)W=40
W^2+3W-40=0
(W+8)(W-5)=0
W-5=0
W=5 CM. FOR THE WIDTH
L=5+3=8 CM FOR THE LENGTH.
PROOF:
5*8=40
40=40