# What is the cross product of [2, 1, -4] and [1, -4, 0] ?

| (hati, hatj, hatk, hati, hatj), (2, 1, -4,2, 1), (1, -4, 0, 1, -4) | =
$\hat{i} \left\{\left(1\right) \left(0\right) - \left(- 4\right) \left(- 4\right)\right\} + \hat{j} \left\{\left(- 4\right) \left(1\right) - \left(2\right) \left(0\right)\right\} + \hat{k} \left\{\left(2\right) \left(- 4\right) - \left(1\right) \left(1\right)\right\} =$
$- 16 \hat{i} - 4 \hat{j} - 9 \hat{k} = \left[- 16 , - 4 , - 9\right]$