+0  
 
0
69
2
avatar+702 

http://prntscr.com/li2p4o

critical  Nov 14, 2018
 #1
avatar
0

A, M^-1 = [3   7]

                 [2   5]

Guest Nov 14, 2018
edited by Guest  Nov 14, 2018
 #2
avatar+20680 
+10

matrix help

\(\text{Formula: $\boxed{MM^{-1}=I}$}\)

\(\begin{bmatrix} 5&-7\\ -2 & 3 \end{bmatrix} \begin{bmatrix} 3&7\\ 2 & 5 \end{bmatrix} = \begin{bmatrix} 1& 0\\ 0 & 1 \end{bmatrix} \)

 

so A

 

laugh

heureka  Nov 14, 2018

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