What is the critical f(x,y)=2x^3+y^3+3x^2-3y-12x-4 ?

The critical f(x,y)=2x^3+y^3+3x^2-3y-12x-4 is (1,1),(1,-1),(-2,1),(-2,-1)

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critical f(x,y)=2x^3+y^3+3x^2-3y-12x-4

critical points

f (x, y) = 2 x^{3} + y^{3} + 3 x^{2} - 3 y - 12 x - 4

(1, 1), (1, - 1), (- 2, 1), (- 2, - 1)

Solution steps

2 x^{3} + y^{3} + 3 x^{2} - 3 y - 12 x - 4

Find where

\nabla f (x, y)

is equal to zero or undefined

(1, 1), (1, - 1), (- 2, 1), (- 2, - 1)

What is the critical f(x,y)=2x^3+y^3+3x^2-3y-12x-4 ?
The critical f(x,y)=2x^3+y^3+3x^2-3y-12x-4 is (1,1),(1,-1),(-2,1),(-2,-1)