Mathematics for IGCSE & O level - Equations (Section 3 - No. 37)
What does a positive value of 'a' indicate in the general quadratic equation (ax² + bx + c = 0) ?
The parabola opens upwards.
The parabola opens downwards.
The vertex is at (0,0).
The parabola is a straight line.
解释
A positive 'a' means the parabola opens upwards.