# Add & subtract rational expressions: factored denominators

Example: Add and simplify x/(2x+1)(x-7) + 2x²/(2x-3)(x-7).

If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.

If you're behind a web filter, please make sure that the domains ***.kastatic.org** and ***.kasandbox.org** are unblocked.

Main content
# Add & subtract rational expressions: factored denominators

### Problem

Example: Add and simplify x/(2x+1)(x-7) + 2x²/(2x-3)(x-7).