2 4 xy 6 5 x 0 4 July 8, 2019 16 32 64 128 Tìm y 2 4 xy 6 5 x 0 4 Bài 2 tìm ya 2 4 xy 6 5 x 0 4 Xy 6 6xy - 4y + 6 - 9x
