Question 964080
Complete the square in x and y.
{{{x^2-14x+y^2+2y=14}}}
{{{x^2-14x+49+y^2+2y+1=14+49+1}}}
{{{(x-7)^2+(y+1)^2=64}}}
Center : ({{{7}}},{{{-1}}})
Radius : {{{sqrt(64)=8}}}