2 55 0 6 July 8, 2019 16 32 64 128 2 6х 55 0 X 2 6x 55 0 Х 2 6х 55 0 Y 2 6y 55 0 A 2 6a 55 0 X 2 6 55 0 2 6x 55 0 X 2 6x 55 0 complete the square M 2 6m 55 0