You should use your diagram you made in a) to help you.
After making part a), you'll see that there are two points of intersection.
First, solve for x being positive, rejecting one value. Your diagram would tell you which one to reject.
Then, do the same thing with the negative value of x.
Finally, you should get
x = 2
$\displaystyle x = \frac14(-1-\sqrt{17})$