Question

Use the matrix inverse to solve the system of equations

Answer 1

x + 5y = 3
2x 7y = 6:

Answer 2

I don't understand how to do it because ad-bc=0???

Answer 3

im doing similar stuff in my class right now but idk how to do this either lol

Answer 4

\[\left[\begin{matrix}-1 & 5 \\ 2 & -7\end{matrix}\right] \left[\begin{matrix}x \\ y\end{matrix}\right]=\left[\begin{matrix}3 \\ 6\end{matrix}\right]\]

Answer 5

then \[\left[\begin{matrix}-1 & 5 \\ 2 & -7\end{matrix}\right]^{-1}= \frac{ 1 }{ 0 }\left[\begin{matrix}-7 & -5 \\ -2 & -1\end{matrix}\right]\]

Answer 6

Like what... am I doing this right

Answer 7

\[A^{-1}=\frac{ 1 }{ detA }\ \left[\begin{matrix}d & -b \\ -c & a\end{matrix}\right]\]

Answer 8

detA = 0?

Answer 9

OMG LOL NVM

Answer 10

I did 5+2 lol

Answer 11

\[\frac{ 1 }{ ad-bc }\]

Answer 12

thanks

Answer 13

can one of you help me with my problem?... it has to do with matrices but it's simpler than this.

Answer 14

I can try tag me to your question

Answer 15

http://openstudy.com/study#/updates/512d5f35e4b098bb5fbc2369