For which values of k is x^2 + kx + 49 a perfect square?

  1. k = 49
  2. k = pm 7
  3. k = pm 14
  4. k = pm 16
Answer

C) k = pm 14

(x pm 7)^2 = x^2 pm 14x + 49, so k = pm 14. SLO M-09-A-20 · Understanding

Mathematics MCQ · More Factorization MCQs · Practise