Inequalities Day 1

1. Homework Questions
Talk to your neighbor about trouble problems while I hand out books!
Get out info sheets and signed syllabus…

2. Before we get started…
 Homework situation
 Learning Targets

3. What do we need to do in order
to do well this unit?

4. Unit 1
Solving Inequalities

5. Interval Notation

6. Interval Notation can contain union of
sets with the union symbol

7. Graph some examples
1. (3, ∞)
2. [-2, ∞)
3. (- ∞, ∞)
4. [-4, 7)
5. (-14, 2]

8. Now go backwards
 Write the interval notation for the following:
 A)
 B)
 C)
 D)
 E)
 F)

9. Sign Charts
 Solve 2 4 0x − >

10. Sign Charts
 2
5 6 0x x− − > 2
4 8 5 0x x− − ≥

11. Sign Charts
  2 2
( 3)( 1)( 4) 0x x x+ + − ≥
2
4 7 2x x− ≤

12. Sign Charts
  2 2
( 3)( 1)( 4) 0x x x+ + − <2 2
( 3)( 1)( 4) 0x x x+ + − >

13. Would I want to use sign charts here?
 3 5 2 4x − + > 6 4 1 0x− − − <

14. Homework
 P. 265 (7-14, 21-24)
 Solve all using sign charts!