f(x) = x4 - 5x3 + x2 - 2x + 6 f(-4) = (-4)4 - 5(-4)3 + (-4)2 - 2(-4) + 6 = 606
f(x) = x4 - 5x3 + x2 - 2x + 6
f(-4) = (-4)4 - 5(-4)3 + (-4)2 - 2(-4) + 6 = 606
So the remainder is 606.