1(xiii)
The roots of quadratic equation x2 - 1 = 0 are :
- (a)0
- (b)1
- (c)-1
- (d)±1
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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.
The roots of quadratic equation x 2 - 1 = 0 are :
ICSE Class 10 Mathematics PYQ · 2025 Specimen · Section A