Adding Rational Expressions Unlike Denominators

What is the first step in adding or subtracting expressions with unlike bases?

• Make the denominators the same by finding the LCD

• Combine like terms

• Simplify each expression separately

• Multiply the numerators

When adding or subtracting rational expressions, what must you first make sure is done.

• make sure all denominators are common denominators a

• make sure all numerators are common numeratorsb).

• make sure all denominators are different

• make sure all numerators are different d

Add

• A.

• B.

• C.

• D.

Add

• 
• 
• 
• 

• A

• B

• C

• D

• A

• B

• C

• D

• A.
• B.
• C.
• D.

• 
• 
• 
• 

• 
• 
• 
• 

• 
• 
• 
•