Find the Local Maximum and Minimum Values and Saddle Points$f ( x , y ) = 2 x ^ { 3 } + 4 y ^ { 3 } + 3 x ^ { 2 } - 12 x - 192 y + 5$

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The Answer of Find the Local Maximum and Minimum Values and Saddle Points$f ( x , y ) = 2 x ^ { 3 } + 4 y ^ { 3 } + 3 x ^ { 2 } - 12 x - 192 y + 5$

Find the Local Maximum and Minimum Values and Saddle Points $f ( x , y ) = 2 x ^ { 3 } + 4 y ^ { 3 } + 3 x ^ { 2 } - 12 x - 192 y + 5$