1. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Example 1
Add and subtract with the same denominator
Find the sum or difference.
Add numerators.
Simplify.

2. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Example 1
Add and subtract with the same denominator
Find the sum or difference.
Add numerators.
Simplify.
Factor and divide out common factor.
Simplify.

3. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Checkpoint. Find the sum or difference.

4. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Example 2
Find the LCD of rational expressions
Find the LCD of the rational expressions.
Find the ______________________ of 3x3 and 4x4.
least common multiple
Write prime factorization.
Circle common factors.
Factors inside circle.
Factors outside circle.
The LCD of and is ______.

5. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Example 2
Find the LCD of rational expressions
Find the LCD of the rational expressions.
Find the ______________________ of x2 – 4 and x2 + x – 2
least common multiple
The LCD of and is
__________________________.

6. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Checkpoint. Find the LCD of the rational expression.

7. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Checkpoint. Find the LCD of the rational expression.

8. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Example 3
Add expressions with different denominators
Find the sum
Rewrite fractions using LCD, ______.
Simplify numerators and denominators.
Add fractions.

9. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Example 3
Subtract expressions with different denominators
Find the difference

10. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Checkpoint. Find the sum or difference.

11. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Checkpoint. Find the sum or difference.

12. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Checkpoint. Find the sum or difference.

13. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Checkpoint. Find the sum or difference.

14. Add/Subtract Rational Expressions
3.10
Add/Subtract Rational Expressions
Pg. 189, 3.10 #1-21