Question

Please help?

Answer 1

determine the value of each variable.

Answer 2

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@experimentX
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@.Sam.
@agent0smith
@Answerthisnow
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Answer 3

Did you try substitution?

Answer 4

no.

Answer 5

then you should, i guess

Answer 6

i dont seem to get an answer though

Answer 7

i also tried using matrices

Answer 8

It's not a linear system, matrices won't work.

Answer 9

oh 0.o

Answer 10

then what?

Answer 11

Solve for Z in the first one. Then plut it into the Z in the second one.

Answer 12

from there.. we gotta get lucky.

Answer 13

would squaring the first one to get x^2+y^2+z^2+2xy+2xz+2yz=1 help?

Answer 14

I don't really see how.

Answer 15

does solving that using matrices will work?

Answer 16

matrices only work when your system is linear.

Answer 17

Guys, how do you solve a nonlinear system of equations with matrices? Did you not remember the LINEAR part of linear algebra?

Answer 18

solve the first equation for z. plug that z into the second equation. solve the second equation for y. there will be no z's. what do you do next?

Answer 19

that's ugly way to do .. but it should give solution eventually.

Answer 20

ugh. stupid xy term.

Answer 21

@experimentX Does that geometric/arithmetic mean thingy you talked about a long time ago apply here at all?

Answer 22

don't know ... i guess not. that was inequality.
http://www.wolframalpha.com/input/?i=x%2By%2Bz+%3D+1%2C+x%5E2+%2B+y%5E2%2Bz%5E2+%3D+34%2C+x%5E3%2By%5E2%2Bz%5E3+%3D+97

Answer 23

Here is what we can do ...
the first is a plane, the second is a sphere ... I don't know what is third.

so when we solve first and second ... we should get a circle. there is parametric eqation of circle in 3d ... of course we could apply suitable transform to reduce it in xy plane.
using the parametrization we solve for it.

Answer 24

what kind of help

Answer 25

extremely complicated help. It's in the link on the first comment.