Objective (DAY 1):
Solve quadratic equations using the quadratic formula.
~ DAY 1
The Quadratic Formula
** KEY INFORMATION:
~ Equation must be in standard form: ax2 + bx + c = 0
~ Can be used to solve ANY quadratic equation
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
** NOTE: The quadratic formula is derived by completing the square of ax2 + bx + c = 0
1
~ DAY 1
The Quadratic Formula SONG
http://www.youtube.com/watch?v=79F2QxpjBz0
REVIEW: Simplify the following expressions.
1.) 2.) 3.) 4.) 5.)
** DO EXAMPLES ON THE BACK
Section 4.8 (1) HW
PG 296­297, #3­23 odd & 29 2
Examples: Solve the following quadratic equations using the quadratic formula.
1.) 2x2 + 6x + 1 = 0
2.) 3x2 ­ 2x ­ 1 = 0
3
3.) 2x2 +4x = ­ 3
4.) 25x2 ­ 18x = 12x ­ 9
4
Time Permitting:
Solutions:
5
Section 4.8 (1) HW
PG 296­297, #3­23 odd & 29 ** #23 & 29 ­ Solve then CHECK BY FACTORING
6
Attachments
AAII 4.7 PH WS KEY.PDF
AAII 4.7 ﴾3﴿ Practice WS KEY.pdf