Warm-up

Warm-up

Homework Answers

4.A Quiz

For the quiz….

You may use your notes

You have 12 minutes!!

4.d Solve Quadratics [4.5, 4.6, 4.7]

After this lesson you will be able to…

find the roots of a quadratic equation by factoring

4 Ways to Solve a Quadratic Equation

Graphing

Factoring

Completing the Square

Using the Quadratic Formula

MAGIC Multiple Add/subtract to get your middle terms Group terms If inside parenthesis work, bring them to

the front and group the other two in parenthesis

Check you work

Review of Factoring

Procedure

Factor like normal Set the first set of parenthesis equal to 0

Set the second set of parenthesis equal to 0

Solve both equations

Example 1 - Starting Simple (me)

(x+3)(x-7)=0

Example 2 (you)

(3x – 9)(x + 2)=0

Example 3 (me)

FACTORx2 – x = 12

Example 4 (you)

FACTORx2 – 12x + 36 = 0

Example 5 (you)

FACTOR9x2 + 16 = -24x

Warm-up

Homework Answers

Example 6 (you)

FACTOR3x2 = 5c

Example 7 (you)

x2 – 36 = 0

Word Problems

A parabola has intercepts x=-8, x=4 and y = -32. What is the equation of the parabola?

Word Problems

A parabola has intercepts x=2, x=-2 and y = -2. What is the equation of the parabola?

Homework:

ST 4.d (Factoring) both sides

Quiz Tomorrow!

Chapter 4 Test will be Thursday 3/21!