(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I uploaded the problem because its easier to see.

2. Relevant equations

3. The attempt at a solution

The solution is there from a practice exam. I don't understand the x,y,z part and how it fulfills the multiplication requirement of a vector space. Could someone please explain to me why it does?

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# Homework Help: Linear algebra vector space

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