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The dimensions of a rectangle can be given by x+7 and x+2. If the area of the area of the rectangle is 66 square inches, what are the dimensions of the rectangle?
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The dimensions of a rectangle can be given by x+7 and x+2. If the area of the area of the rectangle is 66 square inches, what are the dimensions of the rectangle?
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Nov 4, 2018
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The dimensions of a rectangle can be given by x+7 and x+2. If the area of the area of the rectangle is 66 square inches, what are the dimensions of the rectangle?
Mathematics
middle-school
Romina Liuzzi
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Romina Liuzzi
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(x+7)(x+2)=66
x²+9x+14=66
x²+9x-52=0
(x-4)(x+13)=0
x=4 or x=-13
x cannot be negative, so the only answer is x=4
the length is 11 and the width is 6
Gergo Erdosi
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Nov 9, 2018
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Gergo Erdosi
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