Mathematics
Grade10
Easy

Question

Find the solutions of equation x squared equals 1.

  1. x equals plus 1
  2. x equals plus-or-minus 1
  3. x equals negative 1
  4. x equals plus-or-minus left parenthesis negative 1 right parenthesis

The correct answer is: x equals plus-or-minus 1


    x squared equals 1
    Taking square root on both the sides of the equation, we get
    √ left parenthesis x squared right parenthesis equals plus-or-minus √ 1
    x equals plus-or-minus 1

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