## Algebra 2 (1st Edition)

$$5\pm 2\sqrt{7}$$
Solving the equation for x, we find: $$x=\frac{-\left(-30\right)+\sqrt{\left(-30\right)^2-4\cdot \:3\left(-9\right)}}{2\cdot \:3} \\ 5\pm 2\sqrt{7}$$ Checking this solution by plugging it back in, we find that the solution is correct.