Y x 3 6x 2 4m 9 x 4 July 8, 2019 16 32 64 128 Y x 3 6x 2 4m 9 x 4 nghịch biến 6xy - 4y + 6 - 9x 9) (4x ^ 2 - y ^ 2)/((6x - 3y) ^ 2)
