Question

Find the Product of the following matrices, if possible:
will give a medal :)

Answer 1

@agent0smith

Answer 2

I could do this but I'd have to do it by hand and you might not follow it. This video might be more useful, it's multiplying a 3x3 matrix by a 3x1 just as you are:
http://www.youtube.com/watch?v=IRdVU8tyRDU

Answer 3

\[\left[\begin{matrix}4&1&0\\-1&1&-4\\-8&9&-9\end{matrix}\right]\cdot\left[\begin{matrix}6\\1\\8\end{matrix}\right]=\left[\begin{matrix}(4\times6)+(1\times1)+(0\times8)\\ (-1\times6)+(1\times1)+(-4\times8)\\(-8\times6)+(9\times1)+(-9\times8)\end{matrix}\right]\]

Answer 4

thank you so much @SithsAndGiggles

Answer 5

thank you so much @SithsAndGiggles

Answer 6

You're welcome.