Mathematics for IGCSE & O level - Graphs Of Functions (Section 3 - No. 9)
The graph of a quadratic equation has a vertex at (2,3). If the parabola opens upwards, then:
The equation has no real roots.
The equation has one real root.
The equation has two distinct real roots.
The equation always has the same roots
Explanation
If the parabola opens upwards, the vertex is the minimum point. For the graph to cross the x-axis, the equation must have 2 distinct real roots.
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