How do we add and subtract rational expressions

The video tutorial explains how to add and subtract rational expressions, focusing on finding common denominators and simplifying expressions. It begins with a review of adding fractions, then transitions to rational expressions involving polynomials. The tutorial covers combining like terms and provides examples of handling expressions with different denominators, emphasizing the importance of simplification.

What is the first step in adding or subtracting rational expressions with different denominators?

How do you determine if two polynomials can be combined when adding or subtracting rational expressions?

Explain how to combine rational expressions that have the same denominator.

Describe the process of simplifying the numerator after combining rational expressions.

What is the significance of finding the least common denominator (LCD) when working with rational expressions?