Mathematics for IGCSE & O level - Graphs Of Functions (Section 2 - No. 13)
Which of the following statements is true regarding the roots of a quadratic equation?
They are always real numbers.
They are the x-intercepts of the graph.
They can be found by setting y=0.
They can be found at the vertex of the graph.
Explanation
Roots are where the graph intersects the x-axis and are found by setting y=0.
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