How to use the LCD to help us solve a rational equation

The video tutorial reviews the concept of finding the Least Common Denominator (LCD) for polynomials, a topic previously discussed in class. It explains the method of multiplying denominators to find the LCD and demonstrates how to apply this to eliminate denominators in expressions. The tutorial also covers simplifying expressions using the LCD, providing examples and step-by-step guidance.

What is a common method to find the LCD for polynomials?

• Divide the numerators

• Subtract the denominators

• Multiply the denominators

• Add the numerators

Why is it important to multiply each term by the LCD?

• To add more complexity to the problem

• To eliminate the denominators

• To increase the value of the terms

• To change the variables

What happens when you divide X * (X - 2) by X?

• You get X + 2

• You get X^2

• You get X - 2

• You get 2X

How many times does X - 2 divide into X * (X - 2)?

• X times

• X - 2 times

• Twice

• Once

What is the result of simplifying X * (X - 2) / (X - 2)?

• 2X

• X

• X - 2

• 1