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SamIam
 5 years ago
Solve the matrix equation for A?
SamIam
 5 years ago
Solve the matrix equation for A?

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SAMIAM
 5 years ago
Best ResponseYou've already chosen the best response.0Oh yay my friends are here

TuringTest
 5 years ago
Best ResponseYou've already chosen the best response.2you need the inverse of the matrix on the left, do you know how to find that?

SAMIAM
 5 years ago
Best ResponseYou've already chosen the best response.0I know how to do that but they want me to do a simpler method

TuringTest
 5 years ago
Best ResponseYou've already chosen the best response.2...like what? maybe it would help if I could actually see the matrix on the right. try to use the equation feature to type it, you can make 2X2 matrices with it.

TuringTest
 5 years ago
Best ResponseYou've already chosen the best response.2is the right side the identity matrix?

SAMIAM
 5 years ago
Best ResponseYou've already chosen the best response.0ya but we didnt really learn that yet. We only learnt multiplying and addition and subtraction

TuringTest
 5 years ago
Best ResponseYou've already chosen the best response.2I can't see the matrix on the RHS is my problem what is it, the identity matrix?

SAMIAM
 5 years ago
Best ResponseYou've already chosen the best response.0Like maybe a is a 2 by 2 matrix

SAMIAM
 5 years ago
Best ResponseYou've already chosen the best response.0ohhh i see it okk i will redraw it

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1since BA=I wouldnt A=B^1 I ?

SAMIAM
 5 years ago
Best ResponseYou've already chosen the best response.0I know but we didnt really use inverse matrices yet But if i cant solve it any other way i will do it that way

TuringTest
 5 years ago
Best ResponseYou've already chosen the best response.2...so that is the identity matrix so we could solve this by multiplying out our matrix A with the one on the LHS and get a system of equations:\[2a_{11}a_{21}=1\]\[3a_{11}2a_{21}=0\]\[2a_{12}a_{22}=0\]\[3a_{12}2a_{22}=1\]

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1\[\begin{pmatrix}a&b\\c&d\end{pmatrix}^{1}=\frac{1}{det}\begin{pmatrix}d&b\\c&a\end{pmatrix}\]

TuringTest
 5 years ago
Best ResponseYou've already chosen the best response.2I only did it this way amistre because they said not to use the inverse... but yes, the inverse seems the smarter/easier way to do it.

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1youre way is fine, I just did that for the practice really :)

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1also, i think the GaussJordan comes up with an inverse as well

SAMIAM
 5 years ago
Best ResponseYou've already chosen the best response.0Ya it does :D Thanks guys
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