Alegbra
Card Set Information
Author:
ECCammi
ID:
157894
Filename:
Alegbra
Updated:
2012-06-09 18:51:54
Tags:
Formulas semester2 notes
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Description:
Notes from semester 2
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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.