1. Bellwork

2. 11-4 Adding & Subtracting Rational Expressions
Algebra 1

3. Adding Expressions
Simplify

4. Subtracting Expressions
Simplify

5. LCM- Least Common Multiple
You need to be able to find the LCM of the denominators.
Then you need to multiply the appropriate factors to get the same LCM for each denominator. Remember to multiply both the numerator AND the denominator by the same number!

6. Example 1
Find the LCM for each pair of rational expressions,
18x^2y^2

7. Example 2 Find the LCM for each pair of rational expressions,
(x-3)(x+3)^2

8. Example 3
Find the difference of
8y-1/12y^3

9. Example 4
Find the sum of
4ap+2am/mnp

10. Example 5
Find the difference of
-4r +20/r^2-16