## alyssababy7 3 years ago simplify the radical expression. (square root of 10/121)

1. campbell_st

$\sqrt{\frac{10}{121}} = \pm \frac{\sqrt{10}}{11}$

2. alexwee123

|dw:1335940997334:dw|

3. thomas5267

The square of something is always positive. So the correct answer should be $$\frac{\sqrt{10}}{11}$$.

4. thomas5267

@campbell_st

5. campbell_st

ok... so $\sqrt{\frac{10}{(-11)^2}} \neq \sqrt{\frac{10}{121}}$

6. thomas5267

Sorry, I mean the square root of real numbers are always positive. Sources: http://mathworld.wolfram.com/SquareRoot.html http://en.wikipedia.org/wiki/Square_root