1.

Find the equation of the circle with centre : `(-2, 3)`and radius 4

Answer» Centre `-=` (-2,3) and radius = 4 units. `:.` Equation of circle,
`(x-h)^(2)+(y-k)^(2)=r^(2)`
`rArr" "(x-2)^(2)+(y-3)^(2)=4^(2)`
`rArr" "x^(2)+4x+4=y^(2)-6y+9=16`
`rArr" "x^(2)+y^(2)-4x-6y-3=0`


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