Quadratic Equations
posted by Mya
Determine the value of "m" that will give the quadratic 3x^2 + 4x + m = 0 :
a) two equal roots
b) no real roots.

Reiny
For two equal roots, the discriminant has to be zero, ...
b^2  4ac = 0
16  4(3)(m) = 0
16 = 12m
m = ....
For no real roots, b^2  4ac < 0 , so ....
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