A circle has its center at (0,0)(0, 0)(0,0) and passes through (3,4)(3, 4)(3,4). What is its equation?
x2+y2=7x^2 + y^2 = 7x2+y2=7
x2+y2=25x^2 + y^2 = 25x2+y2=25
x2+y2=5x^2 + y^2 = 5x2+y2=5
x+y=5x + y = 5x+y=5