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1966 AMC 12 Question 3

AMC12 · 1966 AMC 12

Question 3

If the arithmetic mean of two numbers is $6$ and their geometric mean is $10,$ then an equation with the given two numbers as roots is:
  1. $x^2+12x+100=0$
  2. $x^2+6x+100=0$
  3. $x^2-12x-10=0$
  4. $x^2-12x+100=0$
  5. $x^2-6x+100=0$