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Triss [41]
3 years ago
9

Solve 4x^2-16x-84 by factoring, completing the square and, by quadratic formula(show work, pls)

Mathematics
1 answer:
Harlamova29_29 [7]3 years ago
7 0

Answer:

-500 (I think)

Step-by-step explanation:

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Answer:

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2. you can also use the symbols option and there is shows little numbers but only gives you the option for the power of 2 and 3

example: 6³

3. click equation option and put the x^2 and then delete the x and put the number or variable and then within the brackets put what the power should be.

Step-by-step explanation:

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3 years ago
What is the vertex form of the quadratic equation represented on the table?
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Check the picture below, so the parabola looks more or less like so, hmmm with a vertex at (-1 , -4), so, using those values from the table

~~~~~~\textit{vertical parabola vertex form} \\\\ y=a(x- h)^2+ k\qquad \begin{cases} \stackrel{vertex}{(h,k)}\\\\ \stackrel{"a"~is~negative}{op ens~\cap}\qquad \stackrel{"a"~is~positive}{op ens~\cup} \end{cases} \\\\[-0.35em] \rule{34em}{0.25pt}

\stackrel{vertex}{\stackrel{h}{-1}~~,~~\stackrel{k}{-4}}\qquad \implies y=a[x-(-1)]^2-4\implies y=a(x+1)^2-4 \\\\\\ \textit{we also know that} \begin{cases} x=2\\ y=14 \end{cases}\implies 14=a(2+1)^2-4\implies 18=9a \\\\\\ \cfrac{18}{9}=a\implies 2=a~\hspace{10em}\boxed{y=2(x+1)^2-4}

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2 years ago
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4 years ago
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Step-by-step explanation:

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