a/ M(x) = 4x3 + 3 + 5x2 + 4x3 - 1 - 2x2
= (4x3 + 4x3) + (5x2 - 2x2) + (3 - 1)
= 8x3 + 3x2 + 2
b/ M(0) = 8 . 03 + 3 . 02 + 2
= 8 . 0 + 3 . 0 + 2 = 2
M(1) = 8 . 13 + 3 . 12 + 2
= 8 . 1 + 3 . 1 + 2 = 8 + 3 + 2
= 13
M(0) = 8 . 23 + 3 . 22 + 2
= 8 . 8 + 3 . 4 + 2 = 64 + 12 + 2
= 68