What is the extreme f(x,y)=x^4-y^4+2x^2y-2y^2-5 ?

The extreme f(x,y)=x^4-y^4+2x^2y-2y^2-5 is None

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extreme f(x,y)=x^4-y^4+2x^2y-2y^2-5

extreme points

f (x, y) = x^{4} - y^{4} + 2 x^{2} y - 2 y^{2} - 5

None

Solution steps

Find the critical points:

None

x^{4} - y^{4} + 2 x^{2} y - 2 y^{2} - 5

has no critical points, therefore there are no extreme points

None

f (x) = 215 x - 3 x^{2} - 650 - 5 x

f (x) = 8 x^{2} + 48 x

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

f (x) = \frac{t}{t - 1}

f (x) = \frac{2}{3} x^{3} + \frac{1}{2} x^{2} - 21 x + 2

What is the extreme f(x,y)=x^4-y^4+2x^2y-2y^2-5 ?
The extreme f(x,y)=x^4-y^4+2x^2y-2y^2-5 is None