The discriminant of a quadratic is the expression inside the radical of the quadratic formula. b-4(ac)
Substitute in the values of a, b, and c
12- 4 (-4 .-9)
Simplify each term.
Raise 12 to the power of 2
144 - 4 (-4 .-9)
Multiply -4 by -9
144-4 x 36
subtract 144-44
