Question

x cube - x square + X+1 , prove that it is a factor of (X+1)​

Answer 1

x+1 = 0

x= -1

(-1)^3-(-1)^2-1+1

-1+1-1+1

-2+2

0

hence, x cube - x square + x +1 =0 is proved having factor (x+1)