warm-up. homework answers 4.a quiz for the quiz…. you may use your notes you have 12 minutes!!
TRANSCRIPT
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!