Factorise x^2 - 9.

  1. (x - 3)^2
  2. (x + 9)(x - 1)
  3. (x + 3)^2
  4. (x + 3)(x - 3)
Answer

D) (x + 3)(x - 3)

Difference of squares: x^2 - 3^2 = (x + 3)(x - 3). SLO M-09-A-17 · Knowledge

Mathematics MCQ · More Factorization MCQs · Practise