How to Plot the Graphs of the quadratic functions using the completion of squares method for choosing symmetrical points.
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The steps to sketch a quadratic equation by completing the square are:
Complete the square. Equation should be in y = a(x - h) 2 + k form (*Memorise)
Determine shape and turning point of the curve (*Memorise) If a < 0, it is a maximum curve ('sad face') ...
Find the x-intercepts and y-intercept.
Plot the graph.
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