Find the equation of the tangent to the circle x2+y2−4x−6y+8=0x^2 + y^2 - 4x - 6y + 8 = 0x2+y2−4x−6y+8=0 at the point (2,2)(2, 2)(2,2).
x=2x = 2x=2
y=2y = 2y=2
x+y=4x + y = 4x+y=4
x−y=0x - y = 0x−y=0