A25­5NotesPart1ZPPRateOfChange.notebook
February 06, 2015
Algebra 2
Ch.5 Notes Page 21
P21 5­5 Quadratic Equations (Part 1)
Aug 19­6:20 AM
Solving Quadratic Equations means to find out where the Parabola touches the x­axis.
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Solve by Factoring
Use Zero Product Property
If ab = 0 then a = 0 or b = 0.
y = x2 + ­4x + ­21
The solutions are (­1, 0) and (1, 0)
y = (x + 3)(x + ­7)
What is the value of y on the x­axis?
y = 0
Set y = 0 and Solve each Factor for x.
0 = x + 3
Sep 22­9:21 AM
and 0 = x + ­7
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A25­5NotesPart1ZPPRateOfChange.notebook
Factor First y = 8x2 + 2x + ­15
February 06, 2015
Factor First y = x2 + x
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Feb 6­10:48 AM
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A25­5NotesPart1ZPPRateOfChange.notebook
February 06, 2015
Feb 2­1:58 PM
Feb 2­2:00 PM
HW #21
5­5 P270 #1­6,36­39,46­50
Please put your name and class period at the top of the homework. Also include the homework number.
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Aug 19­6:25 AM
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A25­5NotesPart1ZPPRateOfChange.notebook
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