SOLUTION: the length of a rectangle is 8 cm greater than its width. find the dimensions of the rectangle if its area is 105cm squared.

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Question 184390: the length of a rectangle is 8 cm greater than its width. find the dimensions of the rectangle if its area is 105cm squared.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
L=W+8
(W+8)W=105
W^2+8W=105
W^2+8W-105=0
(W+15)(W-7)=0
W-7=0
W=7 ANS.
L=7+8=15 ANS.
PROOF:
7*15=105
105=105