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July 23, 2014

Homework Help: Math (Quadratics)(Discriminants)

Posted by Drake on Wednesday, June 26, 2013 at 10:39am.

If a is a real number and a cubic equation
f(x)=x^3−8x^2+(a+12)x−2a
has a repeated root, what is the sum of all the possible values of a?

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