# Warm Up # _____ Write on a new page*** Add or subtract.

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Warm Up # _____ Write on a new page*** Add or subtract.

Objective: Students will be able to add and subtract rational expressions.

Adding and Subtracting Rational Expressions with Like Denominators Directions: Add or subtract. Identify any x-values for which the expression is undefined. Example 1:

Example 2

Your turn… Example 3: Example 4:

Least Common Multiple LCM – the smallest number that is a multiple of two other numbers. (Ex: the LCM of 3 and 5 is 15, because that is the smallest number that is a multiple of both 3 & 5.) Finding the LCM: Step 1: Factor each polynomial completely and write any repeated factors as powers. Step 2: List the different factors. Take the highest power of any common factors.

Finding the LCM Find the LCM for each pair. Example 5: 4x 3 y 7 and 3x 5 y 4 Example 6: x 2 – 4 and x 2 + 5x + 6

Adding Rational Expressions Add. Identify any values that make the expression undefined. Example 7:

Example 8

Example 9

Homework for tonight Homework # ____ Textbook pg. 332 # 17, 18, 20, 21, 22, 23, 25, 29