Mathematics for IGCSE & O level - Graphs Of Functions (Section 5 - No. 31)
What is the best way to find the roots of a quadratic equation using a graph?
Find where the graph intersects the y-axis.
Find the vertex of the graph.
Find where the graph intersects the x-axis.
Find the highest and lowest values on the graph.
Explanation
The roots are the x-intercepts.
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