Let $f ( x , y ) = x ^ { 2 } + 3 x y - 7 x - 8$. Find $f ( 2 h , 3 k )$.
Select the correct answer.
A) $9 h ^ { 2 } + 18 h k - 21 h - 8$
B) $4 h ^ { 2 } + 18 h k - 21 h - 8$
C) $4 h ^ { 2 } + 18 h k - 14 h - 8$
D) $6 h ^ { 2 } + 18 h k - 42 h - 48$

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The Answer of Let $f ( x , y ) = x ^ { 2 } + 3 x y - 7 x - 8$. Find $f ( 2 h , 3 k )$.
Select the correct answer.
A) $9 h ^ { 2 } + 18 h k - 21 h - 8$
B) $4 h ^ { 2 } + 18 h k - 21 h - 8$
C) $4 h ^ { 2 } + 18 h k - 14 h - 8$
D) $6 h ^ { 2 } + 18 h k - 42 h - 48$

Let f(x,y)=x2+3xy−7x−8f ( x , y ) = x ^ { 2 } + 3 x y - 7 x - 8f(x,y)=x2+3xy−7x−8

Let $f ( x , y ) = x ^ { 2 } + 3 x y - 7 x - 8$