Show that the equation x2+y2-6x+4y-36=0 represents a circle.Also find its centre and radius.

Dear student
Given , x2+y2-6x+4y-36=0x2-6x+y2+4y=36x2-6x+9+y2+4y+4=36+9+4x-32+y+22=49  which respresents the equation  of the circle with radius=7 and centre 3,-2
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