Here's the question and answer to the question my teacher has.

a. Calculate parametric equations for the line of intersection of the planes:

3x - 2y + z = 1 & 2x + y - 3z = 3.

n1 = (3, -2, 1) & n2 = (2, 1, -3) -->

vector of the line is: s = (3, -2, 1) x (2, 1, -3) = (5, 11, 7).

Now...why (5, 11, 7)? Shouldn't I multiply each component and get (6, -2, -3)?

Or is this a multiplication of two (1x3) matrices, in which case I still don't seem to get (5, 11, 7).