Search SchoolNGR

Wednesday, 24 June 2026
Register . Login

Find the minimum value of \(y = 3x^{2} - x - 6\).

Find the minimum value of \(y = 3x^{2} - x - 6\).
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A \(-6\frac{1}{6}\)
  • B \(-6\frac{1}{12}\)
  • C \(-6\)
  • D \(0\)
Correct Answer: Option B
Explanation:
\(3x^{2} - x - 6 = y\)
\(a = 3, b = -1, c = -6\)
Minimum value of x = \(\frac{-b}{2a} = \frac{-(-1)}{6} = \frac{1}{6}\)
\(y(\frac{1}{6}) = 3(\frac{1}{6}^{2}) - \frac{1}{6} - 6 = -6\frac{1}{12}\)

Share question on: