The steps in writing f(x) = 18x + 3x2 in vertex form are shown, but a value is missing in the last step. write the function in standard form. f(x) = 3x2 + 18x factor a out of the first two terms. f(x) = 3(x2 + 6x) form a perfect square trinomial. f(x) = 3(x2 + 6x + 9) – 3(9) write the trinomial as a binomial squared. f(x) = 3(x + – 27

To find the vertex form of parabola given in almost standard form were written following steps:

1.  Write the function in standard form:

2. Factor a out of the first two terms:

3. Form a perfect square trinomial:

4. Write the trinomial as a binomial squared:

The vertex is (-3,-27).

missing value is 3

16.9 times 2.85

step-by-step explanation:

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step-by-step explanation: