Factorise x^4 + x^2 + 1.

  1. (x^2 + x - 1)(x^2 - x - 1)
  2. (x^2 + x + 1)(x^2 - x + 1)
  3. (x^2 + 1)^2
  4. (x^2 + 1)(x^2 - 1)
Answer

B) (x^2 + x + 1)(x^2 - x + 1)

Add and subtract x^2: x^4 + 2x^2 + 1 - x^2 = (x^2 + 1)^2 - x^2 = (x^2 + x + 1)(x^2 - x + 1). SLO M-09-A-18 · Understanding

Mathematics MCQ · More Factorization MCQs · Practise