SOLUTION: Find the dimensions of the rectangle with an area of 70 square feet when the length of the rectangle is x feet and the width is (x-3) feet.
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Question 878415: Find the dimensions of the rectangle with an area of 70 square feet when the length of the rectangle is x feet and the width is (x-3) feet.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Area is length times width, so the area, i.e. 70 square feet is equal to 
times 
.
\ =\ 70)
Factor and solve the quadratic. Hint: 7 plus -10 is -3 and 7 times -10 is -70.
Discard the negative root, since a negative measure of length is absurd in this context.
John
My calculator said it, I believe it, that settles it
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