Answer
$$x=\frac{7 \pm \sqrt{61}}{2}$$
Work Step by Step
We solve the polynomial:
$$x(x-7)=3 \quad \Rightarrow \quad x^2-7x-3=0 \quad \Rightarrow \quad x= \frac{-(-7) \pm \sqrt{(-7)^2-4(-3)(1)}}{2(1)} \quad \Rightarrow \quad x= \frac{7 \pm \sqrt{61}}{2}$$
