- #1

rainwyz0706

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## Homework Statement

We have x^2+y^2+z^2=1, and we want to find the maximum and minimum value of xz+xy-yz.

## Homework Equations

## The Attempt at a Solution

I've simplified the original problem to this point, but I'm not sure what to do next. Could anyone give me some hints? Any help is greatly appreciated!