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jony jain
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Asked: 2023-01-04T10:22:03+00:00 In:

Check whether the following is quadratic equations : (x + 2)³ = 2x (x² – 1)

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NCERT Solutions and Important NCERT Questions of Quadratic Equations in Class 10 Maths Chapter 4
NCERT Books for Session 2022-2023 from CBSE Board and UP Board Others state Board, EXERCISE 4.1,
Page No:73,
Questions No:1 Part (vii)

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    1. Best Answer

      (x + 2)³ = 2x (x² – 1)
      Simplifying the given equation, we get
      (x + 2)³ = 2x (x² – 1)
      ⇒ x³ + 6x² + 12x + 8 = 2x³ – 2x
      ⇒ – x³ + 6x² + 14x + 8 = 0
      or x³ – 6x² – 14x – 8 = 0
      This is not an equation of type ax² + bx + c = 0.
      Hence, the given equation is a quadratic equation.

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