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Multiple choice

Find no. of all pairs $(a, b) $ of real numbers such that when ever $\alpha$ is a root of $x^2 + ax+b = 0, \alpha^2 -2$ is also a root of the equation.

  1. $4$
  2. $3$
  3. $5$
  4. $7$
Reveal answer Fill a bubble to check yourself
B Correct answer

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