Question 346436
Hi,
*Note: Area = length*width
The question states the following to be true:
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(3x + 1)*x = 30
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{{{3x^2 + x =30}}}
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{{{3x^2 + x -30=0}}}
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Use the quadratic formual to solve:
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
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*[invoke quadratic "x", 3, 2, -30]