### Home > INT3 > Chapter 9 > Lesson 9.2.3 > Problem 9-128

9-128.

Carmel picks an integer from 1 to 12 as a value for *c* in the equation *y* = *x*^{2} + 4*x* + *c*. What is the probability that his equation will have complex roots? Homework Help ✎

If *b*^{2} − 4*ac* < 0 then the equation will have complex roots.