Find the value of a and b so that (x+1) and (x-1) are factor of x4 + ax3 - 3 x2 + 2x +b

Find the value of a and b so that (x+1) and (x-1) are factor of x4 + a

1.	Find the value of a and b so that (x+1) and (x-1) are factor of x4 + ax3 - 3 x2 + 2x +b
Answer» -7 + 3a + b Hi Rani,a=4,b=-1I cannt attach pic here.