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the length of a rectangle is 1m less than twice the width.If the area of the rectangle is 100m^2,what are the dimensions of the rectangle?

Respuesta :

iloveyou63

Answer:

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

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