1. Warm Up The area of a rectangle is expressed by the polynomial
What could be the perimeter of this rectangle?

2. Lesson 8
Solving Equations

3. Zero Product Principle
A product of factors is zero, if and only if, at least one of the factors is zero.
Ex.1

4. Solving Quadratic Equations
Many second degree (or quadratic) equations can be solved by factoring.
Step 1: Write the equation in the general form:
ax2+bx+c=0
Step 2: Factor.
Step 3: Apply the zero product principle (2 cases).
Step 4: Solve each case.
Step 5: Write the solution set.

5. Solving Quadratic Equations
Ex. 2 Solve:
Step 1: Write in general form
Step 2: Factor.

6. Solving Quadratic Equations
Ex. 2 Solve:
Case 1: Case 2:

7. Solving Quadratic Equations
Ex. 3 Solve:
Step 1: Write in general form
Step 2: Factor.

8. Solving Quadratic Equations
Ex. 3 Solve:
Case 1: Case 2:

9. Solving Quadratic Equations
Ex. 4 Solve:
Step 1: Write in general form
Step 2: Factor.
Case 1: Case 2:

10. Solving Quadratic Equations
Ex. 5 Solve:

11. Solving Quadratic Equations
Ex. 6 Solve:

12. Homework
Workbook
P. 23 #22-25
P. 30 #2 & 3
P. 32 #6