SOLUTION: The length of a rectangle is 3 inches greater than its width. Its area is 70 square inches. What are its dimensions?

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Question 897362: The length of a rectangle is 3 inches greater than its width. Its area is 70 square inches. What are its dimensions?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A=L%2AW=70
%28W%2B3%29W=70
W%5E2%2B3W=70
W%5E2%2B3W-70=0

%28W%2B10%29%28W-7%29=0
Only the positive solution makes sense here.
W-7=0
W=7in
Then,
L=7%2B3
L=10in