X = - 7 - Y (-7 - Y)^2 + Y^2 = 25 -(7 +Y)^2 + Y^2 = 25 - Y^2 - 14Y - 49 +Y^2 = 25 - 14Y = 25 + 49 - 14Y = 74 Y = - 5 2\7 X = - 7 + 5 2\7 = - 1 4\7