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The area of a rectangle is 21 meters squared and the length of the rectangle is 1 meter less than double the width find the dimensions of the rectangle ?
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Sep 6, 2022
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The area of a rectangle is 21 meters squared and the length of the rectangle is 1 meter less than double the width find the dimensions of the rectangle ?
Mathematics
high-school
Maxim Zubarev
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Maxim Zubarev
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Area = length x width
21 = (2w-1)w
21 = 2w^2 -w
2W^2 - w -21=0
(2w-7 )(W +3)=0
2W-7=0 or w+3=0
W=7/2 or w=-3
Width cannot be negative.
So width is 7/2=3.5
Then the length is 6
Joe Love
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Sep 10, 2022
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Joe Love
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