If X- 6 is the only x-intercept of the graph of a quadratic equation, which statement best describes the discriminant of the equation?
A-The discriminant is 0.
B-The discriminant is 6.
C-The discriminant is positive.
D-The discriminant is negative.

ANSWERS

2016-04-17 14:55:04

The rule, letting d=discriminant: d>0, two real solutions d=0, one real solution d<0, no real solution (but there are two imaginary solutions) So if it has only one real solution, the discriminant is equal to zero.

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