a rectangle has a length of 3 inches less than twice its width it's the area is 20 square inches what are the dimensions of rectangle
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a rectangle has a length of 3 inches less than twice its width it's the area is 20 square inches what are the dimensions of rectangle
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Length = 5 inches
Width = 4inches.
Area = length × width
x(2x-3)=20
2x²-3x=20
2x²-3x-29=0
x= -(-3)±√-3²-4x2x-20/2x2
x= 3±√9+160/4 = 3±√169/4 = 3±13/4
x= 3+13/4 and 3-13/4
x cannot be a negative number as it is dimension
x= 4
Width = 4 inches.
Length = 2×4-3 = 8-3
Length = 5 inches
hope it helps