Multiple choice

The H.C.F of (x3 + x2 + x + 1) and (x4 - 1) is

  1. (x2 - 1) (x2 + 1)

  2. (x + 1) (x2 + 1)

  3. (x + 1 ) (x2 - 1)

  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

x3 + x2 + x + 1 = (x2 + 1) (x + 1) and x4 - 1 = (x - 1) (x + 1) (x2 + 1) H.C.F. = (x + 1) (x2 + 1)