Find equations for the contours and draw a contour diagram on planes
xOY
,
xOZ
, and YOZ. Using the contour diagrams sketch 3D quadric surfaces and name thom. i.
,Z=2x^(2)+5y^(2)-12
Plane XOY
Z=0
Plane XOZ
Y=0
Plane YOZ
,x=0