To factorise x^2-8x+15 we need two numbers whose sum is -8 and product is 15. They are:

  1. -6 and -2
  2. 1 and 15
  3. -5 and -3
  4. 5 and 3
Answer

C) -5 and -3

-5 + (-3) = -8 and -5 (-3) = 15, so x^2-8x+15 = (x-5)(x-3). SLO M-09-A-17 · Knowledge

Mathematics MCQ · More Factorization MCQs · Practise