Question 374781
Complete the square in x and y.
{{{x^2-2x+y^2+6y-15=0}}}
{{{(x^2-2x+1)+(y^2+6y+9)-15=1+9}}}
{{{(x-1)^2+(y+3)^2=10+15}}}
{{{highlight((x-1)^2+(y+3)^2=25)}}}
.
.
({{{h}}},{{{k}}})=({{{1}}},{{{-3}}})
{{{R=5}}}