Lesson 5-6: Quadratic Formula

Algebra II CP

Mrs. Mongold

The Quadratic Formula

Use this to solve quadratic equations

a

acbb

2

42

Example 1: x2 – 3x – 40 = 0

Example 2: 2x2 – 9x – 5 = 0

Example 3: x2 + 6x – 9 = 0

Example 4: x2 + 4x + 10 = 0

Homework

Pg 281/16-24 Even – Just do part c.

Homework Day #2Solve using the method of your choice!

1. x2 – 30x – 64 = 0 2. 7x2 + 3 = 0 3. x2 – 4x + 7 = 0 4. 2x2 + 6x – 3 = 0 5. 4x2 – 8 = 0 6. 4x2 + 81 = 36x 7. 2x2 – 5x + 7 = 3 8. 2x2 – 7x – 15 = 0 9. x2 + 2x + 7 = 0 10. 3x2 + 7x – 2 = 0