Mathematics for IGCSE & O level - Sketching Curves (Section 5 - No. 18)
Which of the following can be determined by looking at a completed square form of a quadratic equation?
The y-intercept
The vertex.
The axis of symmetry.
The roots of the equation.
Explanation
Completed square form is used to read the vertex/turning point, and thus, axis of symmetry.
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