Find the square root of x^2-18x+81.

  1. pm(x+81)
  2. pm(x+9)
  3. pm(x-9)
  4. pm(x-18)
Answer

C) pm(x-9)

x^2-18x+81 = (x-9)^2, so the square root is pm(x-9). SLO M-09-A-20 · Understanding

Mathematics MCQ · More Factorization MCQs · Practise