The Matrix c=1 -2 (top)-3 7(bottom) was used to encode a phrase to [7 -28 -25-35-2 -21 107 90 123 17] . find C^_ and use it to decode the matrix. I need someone to show me how i would decode a matrix. i will become a fan and give a medal to whoever helps me

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The Matrix c=1 -2 (top)-3 7(bottom) was used to encode a phrase to [7 -28 -25-35-2 -21 107 90 123 17] . find C^_ and use it to decode the matrix. I need someone to show me how i would decode a matrix. i will become a fan and give a medal to whoever helps me

Mathematics
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*the screenshots are easier to understand * I will BECOMe a Fan*
you can encode it using column vectors

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i dont know what that is
which one do you want help with, number 13?
yes
ok we want to encode the phrase, one question to go. i believe we want to include spaces. so we can use a matrix
isn't 1 -2 the matrix ? -3 7
The idea here is to code it this way $$ \begin{bmatrix} 1 & -2 \\ -3& 7 \end{bmatrix} \cdot \begin{bmatrix} O & E& Q& E & T & O\\ N &\_ & U & S & I & N \end{bmatrix} $$
so what i do next multiply it ?
The idea here is to code it this way $$ \begin{bmatrix} 1 & -2 \\ -3& 7 \end{bmatrix} \cdot \begin{bmatrix} O & E& Q& E & T & O& \_ &O &G\\ N &\_ & U & S & I & N &T &\_ &O \end{bmatrix} $$
do you agree with that so far, we just need to change the letters to numbers now
oh thats all we have to do ?
change to numbers and multiply, yes
okay i think i got it now
but where did you get all those letters from ?
read it down vertically
ok
do i replace the _ with a zero ?
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right
okay i seee lol ....
here is an example http://aix1.uottawa.ca/~jkhoury/cryptography.htm
oh that's what you meant by using column vectors
right, the only difference they used number 27 for _ and we used 0
yeah , so when you decode it ,it'll turn into letters or a phrase
right
okay i understand how to do it , it's going to take me a minute to get my answer soo thanks for helping me understand it .

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