Question

Write the equation for the circle in standard form

x2 + y2 - 12x - 12y + 36 = 0

Answer 1

Equation of a circle (unit circle):
x^2+y^2=1

x^2+y^2-12(x+y-36)=0
 
Try and solve

You will end up with the equation 
(x-6)^2+(y-6)^2=36