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get your like variables together and complete the squares .... which part is giving you pause?

you can pull it apart into 3 quads if you like .... that might be less data to cull thru.

i don't know how to solve this..i'm sorry

do you know how to complete a square?

it means that it will have a two factors in each variables..all in all it has a 6 factors?

it is x^2 - 6x , 4y^2 + 8y and z^2 + 4z?

the key is, do you know how to complete a square? :)

ah.. its -z^2..

i'm sorry i forgot how to complete a square..

z will be trick only in that you have to account for the -

x^2 -6x ; the x term is -6, how it become -6/2?

oh..i see. thanks i will solve this..

btw do you know about contour plotting?

do you know what kind of contour plot is this if f(x,y) = \[\sqrt{x^2 + y^2}\] ?

http://web.monroecc.edu/manila/webfiles/calcnsf/javacode/calcplot3d.htm
might be useful :)

well it use to work fine, i guess they changed some stuff about

our topic to this is about contour plotting..

|dw:1361892976311:dw|

im not up to date on what contour plotting is, this is mostly from an old, decripid memory :)

x^2 + y = -2
when y=-x^2 -2|dw:1361893200001:dw|

in other words, the contour follows its reflection in the xy plane if that makes sense

what kind of contour plot is that?

it looks like a repeition of a parabola to me, so its a type of cylindar right?

|dw:1361894575970:dw|

i don't know..but i heard that there is a graph named paraboloid, elliptical paraboloid etc..

but i think it is elliptical paraboliod because you said that it is cylindar..