OpenStudy (bruno102):

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

4 years ago
OpenStudy (luigi0210):

How would you like to solve this?

4 years ago
OpenStudy (bruno102):

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

4 years ago
OpenStudy (luigi0210):

Well we should find the discriminant first: $b^2-4ac$

4 years ago
OpenStudy (bruno102):

What is the standard formula?

4 years ago
OpenStudy (luigi0210):

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

4 years ago
OpenStudy (luigi0210):

*4ac

4 years ago
OpenStudy (bruno102):

I am so confused

4 years ago
OpenStudy (luigi0210):

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

4 years ago
OpenStudy (bruno102):

So how do I do it?

4 years ago
OpenStudy (bruno102):

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

4 years ago
OpenStudy (luigi0210):

|dw:1377637575714:dw|

4 years ago