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Mathematics

The roots of quadratic equation x2 - 1 = 0 are :

  1. 0

  2. 1

  3. -1

  4. ±1

Quadratic Equations

ICSE Sp 2025

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Answer

Solving,

⇒ x2 - 1 = 0

⇒ (x + 1)(x - 1) = 0

⇒ x + 1 = 0 or x - 1 = 0

⇒ x = -1 or x = 1.

Hence, Option 4 is the correct option.

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