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The long side of a rectangle is 3x+21 units, and it's area is 3x^2+33x+84. Find the width

The long side of a rectangle is 3x+21 units, and it's area is 3x^2+33x+84. Find the width
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4 votes
The long side of a rectangle is 3x+21 units, and it's area is 3x^2+33x+84. Find the width

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User Jacob Dam
by
7.7k points

1 Answer

3 votes
l*w=area
(3x+21)*w=3x^2+33x+84
w=(3x^2+33x+84)/3x+21
(3(x+4)(x+7))/3(x+7)
w=x+4
answered
User Huxi
by
8.2k points
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