Warm-up Handout!.

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Presentation transcript:

Warm-up Handout!

Warm-up

Homework Answers

4.A Quiz For the quiz…. You may use your notes You have 12 minutes!!

After this lesson you will be able to… 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

Review of Factoring 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

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) FACTOR x2 – x = 12

Example 4 (you) FACTOR x2 – 12x + 36 = 0

Example 5 (you) FACTOR 9x2 + 16 = -24x

Example 6 (you) FACTOR 3x2 = 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!