Question

o

Answer 1

one unit to the left means
f(x+1)

so:
f(x+1) = (x+1)^3 + (x+1)^2 -2(x+1)+1
f(x+1) = x^3+3x^2+3x+1+x^2+2x+1-2x-2+1
f(x+1) = x^3+4x^2+3x+1

Answer 2

it is better to write the resulting function is
x^3+4x^2+3x+1
without the "f(x+1)"