Fill in the Blank with One of the Words or Phrases

Multiple Choice

Fill in the blank with one of the words or phrases listed below. $$\begin{array} { l l l l } \text { quadratic formula } & \text { quadratic } & \text { discriminant } & \pm \sqrt { b } \\\text { completing the square } & \text { quadratic inequality } & ( h , k ) & ( 0 , k ) \\( h , 0 ) & \frac { - b } { 2 a } & &\end{array}$$
-The ---------helps us find the number and type of solutions of a quadratic equation.

A) quadratic
B) quadratic formula
C) discriminant
D) completing the square