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

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

A) -3 and 5

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

Mathematics MCQ · More Factorization MCQs · Practise