Question

answer this question. ..............

Answer 1

$x {}^{3} - x {}^{2} - x + 1$
x+1=0
x= -1

$p(x) = - 1 \: \: \: = ( - 1) {}^{3} - ( - 1) {}^{2} - ( - 1) + 1 \\ - 1 - 1 + 1 + 1 = 0$
yes it is a factor of p(x)