Answer
$$x=-2\pm\sqrt7$$
Work Step by Step
We first check that the function is in the form $ax^2+bx+c$. Then, using the quadratic formula, we obtain:
$$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$$
$$x=\frac{-4\pm \sqrt{(4)^2-4(1)(-3)}}{2(1)}$$
$$x=-2\pm\sqrt7$$
