1. Warm Up
Add or subtract to solve the equations.

2. Adding and Subtracting Rational Expressions
8-2
SWBAT Add and subtract rational expressions.
Holt McDougal Algebra 2
Holt Algebra 2

3. Adding and subtracting rational expressions is similar to adding and subtracting fractions. To add or subtract rational expressions with like denominators, add or subtract the numerators and use the same denominator.

4. 1) Add or subtract. Identify any x-values for which the expression is undefined.+
x – 2

5. 2) Add or subtract. Identify any x-values for which the expression is undefined.–
6x + 1

6. To add or subtract rational expressions with unlike denominators, first find the least common denominator (LCD). The LCD is the least common multiple of the polynomials in the denominators.

7. 8r2s5, 2s3t2, 5s3t Monomials: Find the LCM Try on your own:
3ab5, 2a3b4, 9a2b3
6m3n5, 2mnp2, 12m2n4p

8. Polynomials: Find the LCM

9. Did We Reach Our Objective?
Determine the LCM of
polynomials

10. Homework:
Pg 454
#s 18-21, 36-39