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

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

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

critical points

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

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

Solution steps

x - y - x^{2} y + x y^{2}

Find where

\nabla f (x, y)

is equal to zero or undefined

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

f (x) = x^{4} + 11 x^{3} + 34 x^{2} + 15 x - 2

\frac{x ^{2} + 1}{x ^{2} - 1}

f (x, y) = e^{\frac{( x ^{4} + y ^{4} )}{4}}

x 25 - x^{2}

f (x) = (2 - x)^{\frac{1}{3}}

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