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Find the standard form of the equation of the circle having the following properties: Center at the origin Containing the point (-4,1)

Find the standard form of the equation of the circle having the following properties:

Center at the origin
Containing the point (-4,1)
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Answer #1
The radius of the circle must be
sqrt (4^2 + 1^2) = sqrt 17

The equation is therefore
x^2 + y^2 = 17
or, in a more standard form,
x^2/17 + y^2/17 = 1
answered by: Lulia
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