HELP WITH MATH 100 POINTS!!ONLY REAL ANSWERS PLEASE! WILL GIVE BRAINLIEST

Answer:
Step-by-step explanation:
a.
x^3 - x^2 - 2x + 0 divided by x + 1
x + 1 = 0
x = -1
The number to the left inside the box should be -1, not 1.
The coefficients of the dividend are: 1, -1, -2, and 0. The zero is missing.
-1 | 1 -1 -2 0
-1 2 0
1 -2 0 0
The coefficients of the answer are 1, -2, and 0. The quotient is 1 degree lower than the dividend, so the quotient is x^2 - 2x. The remainder is 0.
b.
f(x) = x^3 - x^2 - 2x
f(0) = 0^3 - 0^2 - 2(0) = 0