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GAIL Polynomials and HCF — practice questions

Explore 1 free Polynomials and HCF questions in GAIL Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Polynomials and HCF questions and exercises with answers

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Find the HCF of 15x² + 8x - 12, 3x² + x - 2, 3x² - 2x and 9x² - 12x + 4.Read the answer and worked solution →

Worked practice questions

Find the HCF of 15x² + 8x - 12, 3x² + x - 2, 3x² - 2x and 9x² - 12x + 4.

  1. 3x - 4
  2. x - 2
  3. 3x - 2
  4. x - 4
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Correct answer: C. 3x - 2

1. Factorise each: 15x² + 8x - 12 = (3x - 2)(5x + 6); 3x² + x - 2 = (3x - 2)(x + 1). 2. Also 3x² - 2x = x(3x - 2); 9x² - 12x + 4 = (3x - 2)². 3. The factor common to all four is (3x - 2). 4. So the HCF is 3x - 2. _Source: RRB Group D CEN-02/2018 PYQ, Q.74._

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