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 The roots of the equation 7x² + x – 1 = 0 are
  • a)
    real and distinct
  • b)
    real and equal
  • c)
    not real
  • d)
    none of these
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The roots of the equation 7x² + x – 1 = 0 area)real and dis...
 Here a = 2, b = 1, c = -1
∴ D = b² – 4ac = (1)² – 4 × 2 × (-1) = 1 + 8 = 9 > 0
∴ Roots of the given equation are real and distinct.
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