Question

What is AB + C?

Answer 1

for AB:

a 1x3 matrix times a 3x2 matrix gives a 1x2 matrix [taking the outer numbers, while the inner numbers must always be the same {3's in this c\[\left[\begin{matrix} ((4)(-1) + (2)(0) + (3)(5)) & ((4)(4) + (2)(2) + (3)(6)) \end{matrix}\right] = \left[\begin{matrix}11 & 38\end{matrix}\right]\]ase}]

now add AB + C
since they are the same dimension, you can add them without problem

\[\left[\begin{matrix}11 & 38 \end{matrix}\right] + \left[\begin{matrix}8 & -5 \end{matrix}\right] = \left[\begin{matrix}19 & 33 \end{matrix}\right]\]