Adding Rational Expressions with Like Denominator

Perform the operation

• A

• B

• C

• D

• k = 7
• x = 7.1
• x = 7.6
• x = 1/7

When adding and subtracting rational expressions, my first step should be to:

• Combine like terms in the numerators.

• Determine a Least Common Denominator.

• Factor all of the numerators and all of the denominators.

• Change the operator to multiplication and reciprocate the second fraction.

Add the rational expressions:

• A

• B

• C

• D

• 
• 
• 
• 

• A.
• B.
• C.
• D.

• 
• 
• 
• 

When adding/subtracting rational expressions with like denominators, we need to ​ (a)   in the numerators .

• combine like terms

• factor

• do special cases

• simplify the expressions

Find the least common denominator of the expression

• 18

• 6x

• 3xy

• 6xy