Question

How many roots does y=x^2-6x+9 have? Will fan and give medal!!

Answer 1

The discriminant might help you.
\( \Delta = b^2 - 4ac \)
The value of the discriminant tells you this information, based on its position in the quadratic formula under a square root.
\(b^2 - 4ac > 0 \) Two Real Roots
\(b^2 - 4ac = 0 \) One Repeating Root
\( b^2 - 4ac < 0 \) No real solutions / Two complex solutions.