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

The critical f(x,y)=x^2+2y^2+4xy+2x+4y is (-1,0)

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critical f(x,y)=x^2+2y^2+4xy+2x+4y

critical points

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

(- 1, 0)

Solution steps

x^{2} + 2 y^{2} + 4 x y + 2 x + 4 y

Find where

\nabla f (x, y)

is equal to zero or undefined

(- 1, 0)

f (x) = x^{3} - 9 x^{2} + 26 x - 24

f (x, y) = x^{3} - y^{3}

f (x) = cos (x) - x

f (x) = x + cos (x)

\frac{x ^{3}}{x ^{2} - 4}

What is the critical f(x,y)=x^2+2y^2+4xy+2x+4y ?
The critical f(x,y)=x^2+2y^2+4xy+2x+4y is (-1,0)