# Question #e5d5b

##### 1 Answer

#### Answer:

Should this be

If this is so then you will have an infinite range of value satisfying the equation.

#### Explanation:

As on our 1 to 1 discussion:

Factorising gives:

Your equation is the

This is a 3-dimemsional equation (3 space)

Set

are solutions to

That is: the intersection of the saddle and plane are all the solutions for

As they two have different gradients it indicates the axis of the saddle are not parallel to the xy plane axis.

I suspect the saddles equivalent to the y-axis will be parallel half way between

If you plot using the information from the factorization where