1. 8.4 Adding and Subtracting Rational Expressions
Objective:
Add and subtract rational expressions
Standard:
Present mathematical procedures
and results clearly, systematically, succinctly
and correctly.

4. C. Simplify:

5. D. Simplify:

6. The least common denominator (LCD) of two rational expressions is the least common multiple of the denominators.
The least common multiple (LCM) of the two
polynomials is the polynomial of the lowest
degree that is divisible by each polynomial.

8. Example 2

9. Simplify:
LCD: (x+5)(x-5)

10. Example 3

12. LCD is
3(x-1)(x+1)
Simplify:

14. LCD is 9

15. LCD is (x-5)(x+3)