Respuestas

2012-11-15T21:24:58+01:00

4x² + y² -16x -2y + 13 = 0


(4x² -16x    )+(y² -2y    )=-13

(4x² -16x + 16) + (y² -2y + 1) =-13 +16 +1



(2x-4)² + (y-1)² = 4