Which equation represents a horizontal shift of x2+y2=9x^2 + y^2 = 9x2+y2=9 to the left by 555 units?
(x−5)2+y2=9(x-5)^2 + y^2 = 9(x−5)2+y2=9
(x+5)2+y2=9(x+5)^2 + y^2 = 9(x+5)2+y2=9
x2+(y−5)2=9x^2 + (y-5)^2 = 9x2+(y−5)2=9
x2+(y+5)2=9x^2 + (y+5)^2 = 9x2+(y+5)2=9