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1955 AMC 12 Question 25

AMC12 · 1955 AMC 12

Question 25

One of the factors of $x^4+2x^2+9$ is:
  1. $x^2+3$
  2. $x+1$
  3. $x^2-3$
  4. $x^2-2x-3$
  5. none of these