1. Exccuse me, Sir. I am looking for the post office.
2. Pardon me. What are the directions to the nearest bank?
3. Could you tell me how to get to the bus station, please?
Cho đa thức P(x) = 3x2 – 4x – 1
P(0) = 3 . 02 - 4 . 0 - 1 = - 1
P(1) = 3 . 12 - 4 . 1 - 1 = - 2