Y x 3 9x 2 15 July 8, 2019 16 32 64 128 Y x 3 9x 2 15x 7 Y x 3 6x 2 9x 15 Y x 3 3x 2 9x 15 Cho hàm số y x 3 3x 2 9x 15 Y=x^3-9x^2+15x-3 -1 3
