1. The Four Seasons - December, 1963 (Oh, What a Night)
Elementary Algebra Lesson 9: Rate of Work

6. Ingredients 3 cups granulated sugar 1 cup light corn syrup 1/4 cup water 1/2 tsp peppermint extract A few drops of red food coloring

7. Candy Canes

9. Unit 5 – Algebra in Context
Word Wall

10. Perfect Squares …

11. Solving
Quadratic Equations

12. Solve: x2 = 11x + 12 x – 12 = 0 , x + 1 = 0 +12 +12 –1 –1 x = 12A
Solve: x2 = 11x + 12
Step 1:
Let each factor equal 0
x – 12 = 0 ,
x + 1 = 0
– –1
Step 2:
Solve each equation
x = 12
x = –1

13. Solve: 3x2 – 27 = 0 3(x + 3)(x – 3) = 0 x + 3 = 0 , x – 3 = 0 –3 –3B
Solve: 3x2 – 27 = 0
3(x + 3)(x – 3) = 0
Step 1: Factor completely
Step 2:
Let each factor equal 0
x + 3 = 0 ,
x – 3 = 0
–3 –3
Step 3:
Solve each equation
x = –3
x = 3

14. Solve: 2x2 = 3x 2x2 – 3x = 0 x(2x – 3) = 0 x = 0 , 2x – 3 = 0 +3 +3C
Solve: 2x2 = 3x
Step 1: Write in standard form.
Move 12x to left side of the
equation. Change the sign.
2x2 – 3x = 0
x(2x – 3) = 0
Step 2: Factor completely
Step 3:
Let each factor equal 0
x = 0 ,
2x – 3 = 0
Step 4:
Solve each equation
x = 0
2x = 3
x = 3/2

15. Solving quadratic equations using Square Root Property
a is a positive number

16. Use square root propertyH
Solve: x2 = 9
Use square root property
This means x = –3 and x = 3

17. Use square root property
Solve: x2 = 12 I
Use square root property

18. Use square root propertyJ
Solve the equation
Use square root property

19. Use square root propertyK
Solve the equation
Divide both sides by 6
Use square root property

20. Use square root propertyL
Solve the equation
3x2 – 33 = 0
Add 33 to both sides
3x = 33
Divide both sides by 3
x2 = 11
Use square root property