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12 June, 05:29

What is f (x) = 7x^2 + 42x written in vertex form?

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  1. 12 June, 07:11
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    Hello:

    f (x) = 7x²+42x

    f (x) = 7 (x²+6x)

    f (x) = 7 (x²+2 (3) (x) + 3²-3²)

    f (x) = 7 ((x+3) ² - 9)

    f (x) = 7 (x+3) ² - 63 ... (vertex form)
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