# Rational Expressions

### By: Marwan Mohamed G11R

## Undefined and Defined Rational Expressions !!

Undefined rational expressions: Solutions that lead to an undefined result specifically 0 at the denominator.

Defined Rational Expression: A solution that is any number will lead to a real number solution.

## Operations Using rational Expression

## Addition/ Subtraction To "Add" or "Subtract" using rational expression you must have a common denominator ( LCD = Lowest common denominator) so that you can add/subtract the numerators together. | ## Divison To divide rational expressions , you must flip the quotient expression and multiply it with the numerator's expression. | ## Multiplication Factor out each expression separately and divide out common factors and write the simplified product. |

## Addition/ Subtraction

To "Add" or "Subtract" using rational expression you must have a common denominator ( LCD = Lowest common denominator) so that you can add/subtract the numerators together.

## Divison

To divide rational expressions , you must flip the quotient expression and multiply it with the numerator's expression.

Simplify Rational Expressions Part 1