### Home > PC > Chapter 2 > Lesson 2.3.2 > Problem2-92

2-92.

Simplify the following rational expressions.

1. $\frac{x}{x-1}-\frac{x}{x-2}$

$\frac{x(x-2)}{(x-1)(x-2)}-\frac{x(x-1)}{(x-2)(x-1)}$

1. $2x-\frac{4}{x+2}$

Change $2x$ to $\frac{2x}{1}$.

Then create a common denominator.