Combining rational expression with unlike denominators

The video tutorial explains how to add and subtract rational expressions by ensuring like denominators. It covers factoring trinomials, using the distributive property, and applying the FOIL method. The tutorial also discusses combining expressions and identifying constraints to avoid zero denominators.

What is the first step when adding or subtracting rational expressions?

• Simplify the numerators

• Find like denominators

• Multiply the numerators

• Add the constants

Which of the following is a method to find the LCM of two expressions?

• Adding the expressions

• Subtracting the expressions

• Factoring the expressions

• Dividing the expressions

What is the purpose of applying the distributive property in simplifying rational expressions?

• To divide the expressions

• To eliminate parentheses

• To add the numerators

• To multiply the denominators

Why can't X equal -7 or 2 in the given rational expression?

• It would make the numerator zero

• It would make the denominator zero

• It would make the expression undefined

• It would make the expression negative

What happens to the terms X^2 - X^2 in the simplification process?

• They add to zero

• They multiply to zero

• They become negative

• They remain unchanged