Adding and Subtracting 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

• k = 7
• x = 7.1
• x = 7.6
• x = 1/7

• A

• B

• C

• D

• A.
• B.
• C.
• D.

Add

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• A

• B

• C

• D