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OpenStudy (anonymous):
Help with Matrix?
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OpenStudy (anonymous):
OpenStudy (anonymous):
Can you just explain how to do it with whole numbers on the side?
ganeshie8 (ganeshie8):
To multiply a matrix by a number, you simply multiply each element in it
ganeshie8 (ganeshie8):
\[\large \color{red}{2\cdot}\begin{pmatrix}1&5\\6&0\end{pmatrix} = \begin{pmatrix} \color{red}{2\cdot}1& \color{red}{2\cdot}5\\ \color{red}{2\cdot}6& \color{red}{2\cdot}0\end{pmatrix} = \begin{pmatrix}2&10\\12&0\end{pmatrix} \]
ganeshie8 (ganeshie8):
Can you work the other matrix multipliction ?
After that you can subtract the second matrix from the first
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OpenStudy (zzr0ck3r):
Subtraction is also component wise.
OpenStudy (zzr0ck3r):
i.e. you subtract matrices just how you think you would.
OpenStudy (anonymous):
Sorry for the delay, had to do something. Just to make sure my answer is Row one; -28,0
Row two= 7,-40
OpenStudy (anonymous):
@ganeshie8
ganeshie8 (ganeshie8):
I think she/he means the final answer... it looks good !
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OpenStudy (anonymous):
You're right! Good job! haha
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