Question

Determine the number of solutions for the quadratic function f(x) = -x2 + 3x - 9.

Answer 1

How would you like to solve this?

Answer 2

I don't know...whatever is the best way. By the way the choices are
A. No real solutions
B. 1 solution (double root)
C. 2 distinct real routes

Answer 3

Well we should find the discriminant first:
\[b^2-4ac\]

Answer 4

What is the standard formula?

Answer 5

\[\frac{-b \pm \sqrt{b^2-ac}}{2a}\]

Answer 6

*4ac

Answer 7

I am so confused

Answer 8

The one posted above is used to solve for solutions, but the discriminant is used to determine the number of solutions

Answer 9

So how do I do it?

Answer 10

I meant for example where is a b c in the equation I gave like the standard form.