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Railways PYQCBT 1 2016

RRB NTPC · Question 89

Factors of x^2 – 6x + 8 are: A) (x – 4) (x – 2) B) (x + 4) (x + 2) C) (x + 8) (x – 2) D) (x – 4) (x + 2)

  1. A

  2. D

  3. C

  4. B

Show answer & explanation

Answer: (A) A

Explanation

Two numbers with product 8 and sum −6 are −4 and −2, so x² − 6x + 8 = (x − 4)(x − 2).