Answer:
f(x) = (x + 4)² - 13
Step-by-step explanation:
You will have to "complete the square [½B]²" to figure this out. Here is how you would set it up:
(x + 4)² → x² + 8x + 16
x² + 8x + 16 - 13 → x² + 8x + 3 [TA DA!]
We know that our vertex formula is correct. Additionally, that -h gives you the OPPOSITE terms of what they really are, and k gives you the EXACT terms of what they really are. Therefore, your vertex is [-4, -13].
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