write the equation for a circle that has a center (-2,4) and radius of 3cm
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The eqn. of a circle with centre (h,k) and radius r is given by,
(x−h)2+(y−k)2=r2.
Accordingly, the reqd. eqn. is,
(x−2)2+(y+3)2=32, i.e.,
x2+y2−4x+6y+4=0.
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