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## Homework Statement

Hi guys, I am having real trouble with the function 10ii) I can take the derivatives, but I feel like I am missing something, with what I have done. I set $f_x=0$and $f_y=0$ but really cant seem to find away to solve, i keep getting (0,0) which when I plug into wolfram it come out with $$x=0,y=-1/2$$, $$x=-1,y=0$$ and $$x=1, y=-2$$

So this make me think have I done the partial right?

## Homework Equations

## The Attempt at a Solution

[/B]

$$\frac{\partial}{\partial x}=-2(x^2y-x-1)(2xy-1)-2(x^2-1)(2x)$$

$$\frac{\partial}{\partial y}=-2(x^2y-x-1)(x^2)$$

$$-2(x^2y-x-1)(2xy-1)-2(x^2-1)(2x)=0$$

$$-2(x^2y-x-1)(x^2)=0$$

but where do I go from here?

Could someone please give advice, thanks in advance.