20 POINTS AND BRAINLYEST!!!!!!!!!
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<u>ANSWER</u>
The vertex form is
<u>EXPLANATION</u>
We use completing squares
We factor -4 out of the first two terms
We add and subtract , that is coming from,
.
The expression in the first parenthesis is now a perfect square.
The function is now in the form,
, where
is the vertex
Hence the vertex is
Answer:
Step-by-step explanation:
The distance (d) between two points in 3 dimensions is ...
d = √((x2 -x1)² +(y2 -y1)² +(z2 -z1)²)
Then the distance between (a, -b, -4) and (0, 0, 0) is ...
d = √((a -0)² +(-b -0)² +(-4 -0)²)
= √(a² +b² +16)