Answer:

So then we see that the required values are:

And the vertex for this case would be:



Explanation:
For this case we have the following function given:

And we want to wrote this equation in the form a(x − h)2 + k
We can divide both sides of the equation and we got:

Now we can comple the square in the rigth part with this:


And now we can multiply both sides by 4 and we got:

So then we see that the required values are:

And the vertex for this case would be:


