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Solution 4.1:6a
From Förberedande kurs i matematik 1
Revision as of 11:27, 27 September 2008 by Ian (Talk | contribs)
we can interpret the left-hand side as the square of the distance between the points
xy
and
00.
The whole equation says that the distance from a point (
xy
to the origin should be constant and equal to
9=3, which describes a circle with its centre at the origin and radius
3.
x−0
2+
y
9=3 
