Question

2
Which two of the following can be factorised with integral coefficients ?
1. x + x² + 1
x + 2x + 2
x - 2x + 1
IV.
x = x + 1
(A) 1 and 1
(B) I and IV
(C) II and in
(D) and​

Answer 1

(B)

Hope it's help you...

Answer 2

I have proof in the images