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19 September, 20:42

What is the first step when rewriting y = 3x2 9x - 18 in the form y = a (x - h) 2 k? 3 must be factored from 3x2 9x x must be factored from 3x2 9x 9 must be factored from 9x - 18 3 must be factored from 3x2 - 18

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  1. 19 September, 21:01
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    Steps in rewriting:

    y = 3 x² + 9 x - 18 = 3 (x² + 3 x) - 18 = 3 ((x² + 3 x + 9/4) - 9/4) - 18 =

    = 3 (x + 3/2) ² - 27/4 - 18 = 3 (x + 3/2) ² - 99/4

    Answer:

    A) 3 must be factored from 3 x² + 9 x.
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