# Math Help - subspace of R3

1. ## subspace of R3

W = {x1}
{x2}
{ x3}

x1-x2 = 0

2x1-3x3 = 4

I have to determine if each set is a subspace of R3 or not.

It's supposed to look like a matrix

$
\begin{bmatrix}x1 \\ x2 \\ x3 \end{bmatrix}
$

2. I'm thinking the answer is no because the set does not contain (0; 0; 0).