f ' (x) = 6x - 6x²
6x - 6x² = 0
6x (1 - x) = 0
x = 0
x = 1
f (0) = 0
f (-1) = 3+2 = 5
f (1) = 3-2=1
f (4) = 3*16 - 2*64 = 48 - 128 = -80
f ' (x) = 6x - 6x²
6x - 6x² = 0
6x (1 - x) = 0
x = 0
x = 1
f (0) = 0
f (-1) = 3+2 = 5
f (1) = 3-2=1
f (4) = 3*16 - 2*64 = 48 - 128 = -80