Completing the square for y = 3 - x^2 - 16x

Please read the forum rules. In particular,

Show all of your work. If you've shown no work at all, the tutors may assume that you're needing help getting started, and may suggest only how to do the first step. Even if you're asking only about the very end of the solution process, still include all of your intermediate steps. Errors may have occurred earlier than you'd realized; correcting part (b) may clear up your confusion on part (d).

One reason for this is that there are a couple different styles for completing the square, and it would be better if we fix up the method you have been taught, rather than confusing you with something a little different. But most important, you can see examples of the process in your textbook, so you don't need us for that; what we can do is to help you do it yourself, and to answer specific questions about the process.

If you don't know how to get started, the first step will be to write the polynomial in descending order.
 
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