1. Tuesday
You need:
- Calculator
- Whiteboard, marker, eraser

2. Section 4-4 Solving by Factoring ax2 + bx + c = 0

3. I can find the solutions to an equation by factoring
Objectives
I can find the solutions to an equation by factoring

4. Zero Product Property
If ab = 0, then
a = 0
b = 0

5. Solving with Factoring
Set each variable factor equal to zero and solve for “x”

6. Equations
Remember, to solve an equation by factoring, the equation MUST be set equal to ZERO first:
ax2 + bx + c = 0

7. Factoring for solutions
x2 – 3x –4 = 0
(x – 4)(x + 1) = 0
Then by the Zero Product Property:
(x – 4) = 0 or (x + 1) = 0
If we solve these for “x” we get the following solutions:
x – 4 = 0, so x = 4
x + 1 = 0, so x = -1
These are the two solutions {-1, 4}

8. Example 2

9. Example 3

10. Example 4

11. Example 5

12. Homework
WS Solving by Factoring