SOLUTION: I have the following quadratic equation that I have been trying to graph for like an hour and I am having the toughest time with it. Could someone please help me ASAP??? Thanks

Question 145839: I have the following quadratic equation that I have been trying to graph for like an hour and I am having the toughest time with it. Could someone please help me ASAP???
Thanks!
Maggie
3x2(squared)-x-1 = 0
Could you provide each step so that I may see where I have messed up. I know that I need to have ax2 + bx - c =0, so a=3, b=-1 and c=-1.
I've have plugged these into the -b +/- b2-4ac over 2a???? But for some reason, I get screwed up about mid way through.
Help!!!
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
You don't need to use the quadratic formula to graph this.

In order to graph , we need to plot some points. To do that, we need to plug in some x values to get some y values

So let's find the first point:

Start with the given function

Plug in

So when , we have

So our 1st point is (-2,13)

-------------- Let's find another point --------------

Start with the given function

Plug in

So when , we have

So our 2nd point is (-1,3)

-------------- Let's find another point --------------

Start with the given function

Plug in

So when , we have

So our 3rd point is (0,-1)

-------------- Let's find another point --------------

Start with the given function

Plug in

So when , we have

So our 4th point is (1,1)

-------------- Let's find another point --------------

Start with the given function

Plug in

So when , we have

So our 5th point is (2,9)

Now lets make a table of the values we have calculated

Now plot the points

Now connect the points to graph (note: the more points you plot, the easier it is to draw the graph)

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