Question

Using the quadratic formula, find the solution to x^2+6x+9=0
.(1 point)

Answer 1

Use the quadratic formula x = [−b ± √(b^2−4ac)]/(2a) with a=1, b=6, c=9:

Discriminant = b^2 − 4ac = 36 − 36 = 0, so
x = (−6 ± 0)/2 = −6/2 = −3.

Solution: x = −3 (double root).