
Carol H. answered 09/29/14
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Experienced Mathematics Tutor w/ Master's Degree in Math
In order to have 1 double real root, the discriminant, b2-4ac must equal zero.
In your problem, a = m, b = -6, and c = 2
b2-4ac = (-6)2 -4m(2) = 0
36 - 8m = 0
36 = 8m
9/2 = m
Nick W.
09/29/14