Find the Discriminant of the Given Function $f ( x , y ) = 3 x ^ { 2 } + 4 x y + 9 y ^ { 2 }$

Multiple Choice

Find the discriminant of the given function $f ( x , y ) = 3 x ^ { 2 } + 4 x y + 9 y ^ { 2 }$

A) $6 x + 4 y$
B) $- 92$
C) $92$
D) $4 x + 18 y$