Ok so I need to simplify this:

$$\sqrt[\LARGE 6] {x^{25}y^{10}\over x^7 y^4}$$

I can easily break it down to the answer $x^3 y$ but I have seen that my answer is actually meant to be $|x^3 y|$

Can anyone please explain to me why I must put my answer in an absolute value?

My question instructs me to simplify the expression and assume all variables are positive.

Thank you