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Cecilia's Random Thoughts
Sunday, October 4, 2015
Analytic Circle
Problem:
Solution:
The center is (3, 2) and the radius is 2 - by reading the graph.
Therefore the center radius form is
(
x
−
3
)
2
+
(
y
−
2
)
2
=
2
2
=
4
.
The general form is given by simply expanding the above, getting
x
2
−
6
x
+
9
+
y
2
−
4
y
+
4
=
4
Simplifying, get
x
2
+
y
2
−
6
x
−
4
y
+
9
=
0
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