What is the extreme f(x,y)=5x^2-xy+3y^2 ?

The extreme f(x,y)=5x^2-xy+3y^2 is Minimum(0,0)

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extreme f(x,y)=5x^2-xy+3y^2

extreme points

f (x, y) = 5 x^{2} - x y + 3 y^{2}

Minimum (0, 0)

Solution steps

Find the critical points:

(0, 0)

\frac{\partial ^{2} f}{\partial x ^{2}} = 6

D (x, y) = 59

Check the sign of at each critical point

Check critical point

(0, 0) :

Minimum

Minimum (0, 0)

p (b, c) = 2 b + 2 c

f (x) = ∣ x - 5 ∣ + 1

g (x) = x 8 - x^{2}

f (x, y) = 400 - 25 x^{2} - 64 y^{2}

f (x) = x^{3} + 3 x^{2} - 9 x - 1

What is the extreme f(x,y)=5x^2-xy+3y^2 ?
The extreme f(x,y)=5x^2-xy+3y^2 is Minimum(0,0)