Write each rational expression in simplest form. State all restrictions on the variables.

x^2-10x/5x

The rational expression x^2-10x/5x can be simplified as follows:

(x^2-10x)/(5x)
= x(x-10)/(5x)
= (x-10)/5

The denominator can never be equal to zero since 5x ≠ 0. Therefore, the restriction on the variable is x ≠ 0.