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Railways PYQCBT 1 2016

RRB NTPC · Question 87

Simplify: 7x + 3x(x – 4) = ? A. 10x + 12 B. 10x – 12 C. 3x^2 + 5x D. 3x^2 – 5x

  1. D

  2. C

  3. A

  4. B

Show answer & explanation

Answer: (A) D

Explanation

Expand: 3x(x − 4) = 3x² − 12x. Then 7x + 3x² − 12x = 3x² − 5x.