- #1

- 223

- 4

## Homework Statement

I have volunteered to help a friend's son with his Algebra 2 (thinking - no problem, I've had Calc 1-3, differential equation, complex variables, probability / stats and so on.

So I start to help and the first questions:

Why aren't these rational expressions:

[tex]

\frac {\sqrt(x)}{(x+3)}

[/tex]

and

[tex]

\frac {\sqrt{(x-y)^2}}{(x)}

[/tex]

## Homework Equations

## The Attempt at a Solution

I know if the square root wasn't in the numerator they would be rational - at least I hope I'm correct.

I don't know why they aren't reational.

Thanks

-Sparky