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Question

Difficulty Level:

Easy

MCQ

An equation of circle $M$ is $x^2+y^2+6 x-2 y+1=0$ . What are the coordinates of the center and the length of the radius of circle $M$ ?

Select all that apply :

center $(-3,1)$ and radius $3$ unit

center $(3,-1)$ and radius $9$ unit

center $(-3,1)$ and radius $9$ unit

center $(3,-1)$ and radius $3$ unit

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