Use the quadratic equation x2+4x+4=0 to answer the questions.
a: what is the discriminant of the quadratic equation?
b: based on the discriminant, which statement about the roots of the quadratic equation is correct?
select one answer for question a, and select one answer for question b.
b: there is one real root with a multiplicity of 2.
a: 0
b: there are two real roots.
a: −16
b: there are two complex roots.
a: 16