To factorise x^2-x-12 we need two numbers whose sum is -1 and product is -12. They are:

  1. 1 and -12
  2. -5 and 4
  3. -4 and 3
  4. 4 and -3
Answer

C) -4 and 3

-4 + 3 = -1 and -4 3 = -12, so x^2-x-12 = (x-4)(x+3). SLO M-09-A-17 · Knowledge

Mathematics MCQ · More Factorization MCQs · Practise