Use the discriminant to describe the number of solutions of the equation x²+8x+16=0.
a) The discriminant is 128, and the equation has two real, rational roots.
b) The discriminant is 0, and the equation has one real, rational root.
c) The discriminant is 128, and the equation has two real, irrational roots.
d) The discriminant is 0, and the equation has two complex roots.
