Answer
$-7i-11j+6k$
Work Step by Step
Let us consider two vectors $v=xi+yj+zk$ and $w=pi+qj+rk$. Then cross product of the two vectors $v$ and $w$ can be computed in the form of determinant as:
$ v \times w=\begin{vmatrix}
i & j & k \\
x & y & z \\
p & q & r \\ \end{vmatrix}$
We have:
$det =v \times u =[(2)(1)-(3)(3)] i -j [(2)(1) - (-3)(3)]+k [(3)(1) -(-3) (1)]=-7i-11j+6k$
