SOLUTION: Use the discriminant to describe the roots of each equation. Then select the best description. x2 + 9x + 14 = 0 double root real and rational root real and irrational root i

Algebra ->  Equations -> SOLUTION: Use the discriminant to describe the roots of each equation. Then select the best description. x2 + 9x + 14 = 0 double root real and rational root real and irrational root i      Log On


   

Question 953464: Use the discriminant to describe the roots of each equation. Then select the best description.
x2 + 9x + 14 = 0
double root
real and rational root
real and irrational root
imaginary root
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
D=b%5E2-4ac
D=9%5E2-4%281%29%2814%29
D=81-56
D=25
Since D%3E0, two distinct roots.
Since the discriminant is a perfect square, the two roots are rational.
Real, rational roots.