What is the critical f(x,y)=-8xy-2x^4-2y^4 ?

The critical f(x,y)=-8xy-2x^4-2y^4 is (0,0),(-1,1),(1,-1)

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critical f(x,y)=-8xy-2x^4-2y^4

critical points

f (x, y) = - 8 x y - 2 x^{4} - 2 y^{4}

(0, 0), (- 1, 1), (1, - 1)

Solution steps

- 8 x y - 2 x^{4} - 2 y^{4}

Find where

\nabla f (x, y)

is equal to zero or undefined

(0, 0), (- 1, 1), (1, - 1)

5 x^{\frac{2}{3}} - 2 x^{\frac{5}{3}}

\frac{p - 1}{p ^{2} + 4}

3 x^{5} - 5 x^{3}

f (x) = (x^{2} + y^{2}) e^{y^{2} - x^{2}}

f (x) = 8 (x - 5)^{\frac{2}{3}}

What is the critical f(x,y)=-8xy-2x^4-2y^4 ?
The critical f(x,y)=-8xy-2x^4-2y^4 is (0,0),(-1,1),(1,-1)