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

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

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

critical points

f (x, y) = x^{2} + y^{2} + x y + 1

(0, 0)

Solution steps

x^{2} + y^{2} + x y + 1

Find where

\nabla f (x, y)

is equal to zero or undefined

(0, 0)

f (x) = 4 x^{3} - 15 x^{2} - 72 x + 5

f (x) = 3 x^{4} - 8 x^{3} + 10

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

f (x) = x^{3} + 5

(x - 2)^{3} (x + 1)

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