## Algebra 1: Common Core (15th Edition)

When taking a square root of a fraction, we take the square root of the numerator (top of the fraction) and denominator (bottom of the fraction) separately. The square root of 1 is 1, and the square root of 9 is 3, giving us an answer of 1/3. However, as we can see, there is a negative outside of the square root. This means that we multiply $\sqrt{ 1/9}$, 1/3, by -1, giving us our final answer: -1/3.