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26 December, 20:25

A process used to make a quadratic expression into a perfect square trinomial is called

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  1. 26 December, 20:59
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    It is completing the square. Very useful since it finds the min or max.

    y = x^2 + 8x + 17

    y = (x^2 + 8x + ...) + 17

    y = x^2 + 8x + (8/2) ^2 + 17 - 4^2

    y = (x^2 + 8x + 4^2) + 17 - 16

    y = (x^2 + 8x + 16) + 1

    y = (x + 4) ^2 + 1

    This means that the graph has a minimum at (-4, 1) Check it out on the graph I've given you.
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