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Mathematics
Problem
Equation
a
x
2
+
b
y
2
+
c
z
2
+
2
f
y
z
+
2
g
x
z
+
2
h
x
y
+
2
u
x
+
2
v
y
+
2
w
z
+
d
=
0
ax^2 + by^2 + cz^2 + 2fyz + 2gxz + 2hxy + 2ux + 2vy + 2wz + d = 0
a
x
2
+
b
y
2
+
c
z
2
+
2
f
y
z
+
2
g
x
z
+
2
h
x
y
+
2
ux
+
2
v
y
+
2
w
z
+
d
=
0
represents a sphere, if
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