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Quadratic Equation

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I am trying to use the quadratic equation and I use the calclet to set the variables what each letter means. and it pops up with an error and unknown variables
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[center]while A=3, B=2.5, and C=-12.5 in the calclet[/center]
 Mar 8, 2013

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 #1
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[input]a=3; b=2.5; c=-12.5; x=(-b+sqrt(b^2-4*a*c))/(2*a)[/input]
[input]a=3; b=2.5; c=-12.5; x=(-b-sqrt(b^2-4*a*c))/(2*a)[/input]
 Mar 8, 2013
 #2
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Thanks for the info that really helped
 Mar 12, 2013

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