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2014 AMC 10B Question 20

AMC10 · 2014 AMC 10B

Question 20

For how many integers $x$ is the number $x^4-51x^2+50$ negative?
  1. $ 8 $
  2. $ 10 $
  3. $ 12 $
  4. $ 14 $
  5. $ 16 $