We have that the quadratic expression is given by:

If we apply the square root to both sides of the equation, we have:
![\sqrt[]{(x-6)^2}=\pm\sqrt[]{9}](https://img.qammunity.org/2023/formulas/mathematics/college/6x1pwuve3r8swuf4wa3oxm737k02gbpdce.png)
As we can see, we will have two solutions. Then, we have:

Then, we have the two possible solutions as follows:

And we need to solve for both of them as follows:
First case
1. We need to add 6 to both sides of the equation:

Second case
2. We need to add 6 to both sides of the equation:

Therefore, in summary, the exact answers are x = 9, and x = 3.