Find and Simplify the Function $$f ( x , y ) = 4 - 6 x ^ { 2 } - 3 y ^ { 2 } \text { at the given value } ( t , 2 )$$

Multiple Choice

Find and simplify the function $$f ( x , y ) = 4 - 6 x ^ { 2 } - 3 y ^ { 2 } \text { at the given value } ( t , 2 )$$

A) $- 6 t ^ { 2 }$
B) $- 8 - 6 t ^ { 2 }$
C) $- 4 - 6 t ^ { 2 }$
D) $16 - 6 t$
E) $8 - 6 t$