Review Problems 1) 2) 3)

Add/Subtract Rational Expressions Objective-to recall procedures used to add and subtract fractions, and apply to rational expressions

Review: Adding Fractions You can only add like to like Same Denominators

Different Denominators Make them the same find a common denominator The product of all denominators is always a common denominator But not always the least common denominator

Finding the LCD Example:

Factor the Denominators

Assemble LCD

Build up Fractions to LCD ×5 ×4

Add Numerators And Reduce if Needed

Rational Expressions Example:

Factor the Denominators

Assemble LCD DENOMINATORS

Build up Fractions to LCD ) ( x - ( ) 1 x + ( ) 1 FACTORED DENOMINATORS LCD x = + - ( )( ) 1

Add Numerators

Simplify Numerator

Summary of Steps Factor denominators Assemble LCD Build up Fractions Add Numerators Simplify Numerator

Try these examples 1) 2) 3)

Answers