Mathematics for IGCSE & O level - Graphs Of Functions (Section 1 - No. 41)
If a quadratic equation has no real roots, how does its graph appear?
It intersects the x-axis twice.
It touches the x-axis at one point.
It does not intersect the x-axis.
It is a straight line.
Explicació
No real roots mean the graph does not intersect the x-axis.