XAT 2019 Question Paper | Quantitative Aptitude and Data Interpretation

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Question 6 : Given that a and b are integers and that 5 + 2√7 is a root of the polynomial x2 – ax + b + 2√7 in x, what is the value of b?

  1. 4
  2. 2
  3. 9
  4. 7
  5. 14

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The question is "Given that a and b are integers and that 5x + 2√7 is a root of the polynomial x2 – ax + b + 2√7 in x, what is the value of b?"

Hence, the answer is 2

Choice B is the correct answer.

 

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