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

Determine whether the following sets form subspaces of R2:

{ (X1, X2) | |X1| = |X2| }

{ (X1, X2) | (X1)^2 = (X2)^2 }

2. Relevant equations

3. The attempt at a solution

I'm clueless. I've been trying to figure it out for a good thirty minutes on both of them, but I'm completely stuck.

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# Subspace Questions

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