1. What type of surface is this:

Answer:
After simplifying, the equation looks as
follows:
![]()
From this we see that the surface is a hyperboloid of two sheets with the y-axis as its axis.
2. What time of surface is:

Answer:
After simplifying, the equation looks as
follows:
![]()
which tells us that it is an ellipsoid that is centered at (2,-1,1).
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