1. Chapter 5 Section 5 Solving Quadratic Equations
Algebra 2
March 6, 2009

2. Warm-Ups
Find the error below. Then factor the equation correctly:

3. Homework Answers
1) 25) (3x+4)(x+9) 3) x; x(x-2) 26) (x-8)(2x-3) 5) 7y; 7y(2y+1) 31) (x+4)(3x-5) 7) (x+1)(x+2) 32) (y+4)(5y-8) 8) (x+2)(x+3) 40) (2n-5)(2n-5) 13) (x-1)(x-2) 41) (3x+8)(3x+8) 14) (x-12)(x-1) 43) (x+2)(x-2) 19) (x-7)(x+2) 45) (3x+1)(3x-1) 20) (x+5)(x-4)

4. Solving Quadratic Equations
Solving: Finding the x-intercepts
Use your graphing calculator:
Example 1:

5. Solving Quadratic Equations
Solve by using factoring:
Set the equation equal to 0
Example 2:
Example 3:

6. Solving Quadratic Equations
Solve using square roots
Isolate the squared term!
Example 4:
Example 5:

7. Solving Quadratic Equations
Different ways the equations can look:
Everything on the same side:
Factor then solve for x
Things on different sides
Get everything on the same side then solve for x
No ‘b’ term:
Use square roots
No ‘c’ term:
Find the GCF

8. Homework #36
Page 270 #1, 2, 9, 11, 13, 16, 19, 23, 24
Chapter 5 Test Part 1 Tuesday
(Section )