# How do you solve using the completing the square method (x-9)^2=1?

##### 1 Answer
Jul 30, 2016

If a number to the square is 1, that number is either 1 or -1

#### Explanation:

If ${\left(x - 9\right)}^{2} = 1$, then $x - 9 = 1$ or $x - 9 = - 1$. Then is either $x = 9 + 1$ or $x = 9 - 1$. The solutions are then $x = 10$ and $x = 8$