One of the factors of x3 − 2x2 + 2x − 1 is
x - 1
x + 1
x - 2
x + 2
x3 − 2x2 + 2x − 1 = x3 − x2 − x2 + x + x − 1
= x2(x − 1) − x(x − 1) + 1(x − 1)
= (x − 1)(x2 − x + 1)
Question :
One of the factors of x5+x+1 is
(1) 2x2 - x - 1
(2) x3 - x2 + 1
(3) x2 - 2x2 + 1
(4) x3 + x2 + 1