Xpower 4-xpower3+x^_x+1

Question

Determine which of the following polynomials has (x+1) as a factor

Answer 1

You need to edit the question. It is not clear what you mean by x^_x.

Anyway, if (x + 1) is the factor of a polynomial, then x = -1 must be a zero of the polynomial. Plug x = -1 into the polynomial and see if it gives zero.