# Matrix equations

• March 27th 2010, 06:44 PM
brumby_3
Matrix equations
Here are the questions at this link:
Yfrog - namei

Note that for a), the last part at the top is 4, I don't know why it came out a bit blurry.
Oh yeah and those are equal signs not minuses in a) and b) :S
• March 28th 2010, 02:33 AM
HallsofIvy
Do you know how to multiply two matrices?

$\begin{bmatrix}2 \\ -4\end{bmatrix}\begin{bmatrix}x\end{bmatrix}= \begin{bmatrix}2x \\ -4x\end{bmatrix}$.

$\begin{bmatrix}3 & -1 \\ 2 & 0\end{bmatrix}\begin{bmatrix}x \\ y\end{bmatrix}= \begin{bmatrix}3x- y \\ 2x \end{bmatrix}$.
• March 29th 2010, 09:22 PM
brumby_3
Oh, is that all it's asking? Yes I know how to multiply matrix - so I don't even need to touch the right side of each matrix equaton, right?