Use the quadratic equation x2+6x+9=0 to answer the questions. a: what is the discriminant of the quadratic equation? b: based on the discriminant, which statement about the number and type of solutions to the equation is correct? select one answer choice for part a, and select one answer choice for part b.

b: the equation has one repeated real solution.
b: the equation has two real solutions.
a: −30
a: −25
a: 0
a: 25
b: the equation has one repeated real solution.