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COCUBES Quadratic Equations — practice questions

Explore 1 free Quadratic Equations questions in COCUBES Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Quadratic Equations questions and exercises with answers

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Two times a number, added to the square of that number, gives 3. What could the number be?Read the answer and worked solution →

Worked practice questions

Two times a number, added to the square of that number, gives 3. What could the number be?

  1. -1 or -3
  2. 1 or -3
  3. -1 or 3
  4. 1 or 3
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Correct answer: B. 1 or -3

1. Let the number be n: n² + 2n = 3. 2. Rearrange: n² + 2n - 3 = 0. 3. Factorise: (n + 3)(n - 1) = 0. 4. So n = 1 or n = -3. _Source: RRB Group D CEN-02/2018 PYQ, Q.14._

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