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Alegbra
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Axis of symmetry
-b/2a
Vertex
Put x value from axis of symmetry back in.
Exponential growth
y=p(1+r)
t
Exponential decay
y=p(1-r)
t
Quadratic formula
When do you solve by roots?
When there's no b term
Solve by roots 4x
2
=49
4x
2
=49/4
x
2
=49/4
Square root to get
x=+or- 7/2
When do you complete the square?
When the middle coefficent is even and when there's no lead coefficent.
Complete the square formula
Completet the square: X
2
-10X+13=0
1. X
2
-10x=-13
2.
=(5)
2
=25
3. (Using the 5 and adding 25)
: (X-5)
2
=12
4.
5.
6.
Author
ECCammi
ID
157894
Card Set
Alegbra
Description
Notes from semester 2
Updated
2012-06-09T22:51:54Z
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