f(x) = x^3 + 8x^2 - 2x is divided by (x+3)
When a polynomial function f(x) divided by (x-a), then remainder is f(a)
Given that f(x) divide by (x+3)
First we set x+3 =0 and solve for x
x+3 =0 so x=-3
Now plug in -3 for x in f(x) and find out f(-3)
f(-3) is the remainder
Remainder is 51
Answer is 51