What is one of the most common mistakes when simplifying rational expressions

The video tutorial explains how to handle expressions with common denominators, emphasizing the importance of combining numerators correctly. It highlights a common mistake students make by attempting to divide terms across addition, which is incorrect. The tutorial clarifies that division is only applicable across multiplication, using examples to illustrate the point. The session concludes with a recap of the correct method and a reminder of the common mistake to avoid.

What is the first step when you have common denominators like X + 4?

• Divide the denominators

• Subtract the numerators

• Combine the numerators

• Multiply the denominators

Why can't you divide terms across addition?

• Because division is only valid across multiplication

• Because it changes the value of the terms

• Because addition is not commutative

• Because it simplifies the expression incorrectly

What is a common mistake students make when dealing with addition and division?

• They add terms across multiplication

• They divide terms across addition

• They multiply instead of divide

• They subtract instead of add

When can you divide terms in an expression?

• When they are divided

• When they are multiplied

• When they are subtracted

• When they are added

What should you remember about dividing terms in expressions?

• Never divide across multiplication

• Divide only when terms are subtracted

• Only divide when terms are multiplied

• Always divide across addition