SOLUTION: can anyone please tell me how to graph a function, for example like {{{f(x) = x^2 + x

SOLUTION: can anyone please tell me how to graph a function, for example like {{{f(x) = x^2 + x - 6}}}

Question 36859: can anyone please tell me how to graph a function, for example like

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
f(x) = x^2 + x - 6

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=25 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 2, -3. Here's your graph:

Hope this helps.
Cheers,
Stan H.
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