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28 January, 11:41

Using the completing-the-square method, rewrite f (x) = x2 + 4x - 1 in vertex form.

f (x) = (x + 2) 2 + 1

f (x) = (x + 2) 2

f (x) = (x + 2) 2 + 4

f (x) = (x + 2) 2 - 5

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  1. 28 January, 15:32
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    F (x) = x² + 4x - 1

    f (x) = x² + 4x + 4 - 4 - 1

    f (x) = (x + 2) ² - 5
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