Question

Find the centre of the circle 6x2+6y2+72x-84y-21=0

Answer 1

Answer:

(-6,7)

Step-by-step explanation:

dividing by 6

x2+y2+12x-84y-21=0

here,

2f=12 and 2g=-14

so,

f=6 and g=-7

we know centre of circle is (-g,-f)

so centre is (-6,7)