Adding and Subtracting Rational Expressions with 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

5/6x + 7/18x

• a). 22/18x

• b). 11/9x

• A
• B
• C
• D

• 
• 
• 
• 

• A.
• B.
• C.
• D.

• k = 7
• x = 7.1
• x = 7.6
• x = 1/7

• A
• B
• C
• D

Perform the operation

• A

• B

• C

• D