The easy way to determine the lcd of two rational expressions and use it to find the sum

The video tutorial explains how to add rational expressions with unlike denominators. It begins by identifying the least common denominator (LCD) and discusses how to adjust fractions to have the same denominator. The tutorial then covers simplifying numerators using the distributive property and concludes with combining fractions that now share a common denominator.

Explain the process of simplifying the numerators after finding a common denominator.

What do you do when you have two fractions with the same denominator?