# Math Help - vectors

1. ## vectors

if you have 3 vectors: them being (x,1,3)
(0,1,2)
(x,1,x)

how do you find the values of x to which you cant form a base of R^3.

doesn't even make sense at least i dont think it does.

2. The determinate cannot be zero.
$\left| {\begin{array}{ccc} x & 1 & 3 \\ 0 & 1 & 2 \\ x & 1 & x \\
\end{array}} \right| = x^2 - 3x$

What values of x gives a determinate of zero?