How to find the LCD to help determine the sum between two rational expressions

The video tutorial explains how to determine the least common denominator (LCD) using consistent numbers and the rules of exponents. It covers the process of breaking down numbers and variables, applying exponent rules, and calculating the LCD for both numbers and variables. The tutorial concludes with a demonstration of simplifying expressions by combining terms and ensuring they are like terms.

What is the purpose of using the same numbers when determining the LCD?

• To avoid using variables

• To ensure consistency in calculations

• To make the process more complex

• To confuse the students

Why is X^2 chosen as the LCD for the variables X^2 and X?

• Because X is not a variable

• Because X^2 is larger than X

• Because X^2 is easier to calculate

• Because X^2 can divide both X^2 and X

What is the LCD for the numbers 3 and 5?

• 3

• 15

• 10

• 5

What should you do after obtaining the LCD in a fraction?

• Combine the terms but do not add unlike terms

• Multiply the terms by random numbers

• Add the terms directly

• Subtract the terms

Why can't 10 and 3X be added together in the final expression?

• Because they are both even numbers

• Because they are not like terms

• Because they are both odd numbers

• Because they are both variables