1. Warm up 3/1/16 happy March!
Write a simplified expression for the area of a rectangle. Write the restrictions. Area = base x height
Answer:

2. 8.5 Adding and Subtracting Rational Expressions (day 1)
I <3 Los Al

3. Objective
To add and subtract rational expressions

4. Prior Knowledge
What is the rule when adding and subtracting fractions?

5. Prior Knowledge
Knowing what you know about adding and subtracting fractions how do you think we are going to apply this to rational expressions?

6. Ex 1) Add/Subtract
(4b2)
(12ab)
(3a2)
LCD
Multiply top and bottom of each fraction to create LCD
Factor!!!

7. T.O.O.
Ex 2) Ex 3) Ex 4)
(5)
(5)
(z)
(x)
(x)
(z)
(4y)
(4y)

8. Ex 5) Denominators must be factored to find LCD (x – 1) (x + 3)
Common denom:
(x + 3)(x – 2)(x – 1)

9. Cont…

10. Steps Factor Denominators Create LCD Find restrictions on LCD
Multiply out Numerators
Combine Like Terms in Numerators
Factor Numerators (if possible)
Cancel (if possible)

11. T.O.O
Ex 6) Ex 7)
LCD = 2h(h-1) LCD = (x-5)(x-1)
Answers
(x-5)
(h)

12. Homework
Pg. 539 #7-21 odd,
31-35 odd, 48

13. TOD
Simplify