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https://prnt.sc/p9b61f

 

really appreciate it

 

 Sep 22, 2019
edited by Melody  Sep 22, 2019
 #1
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I am not actually sure what you are being asked to do.

 

I would assume it means  R2 is replaced by R2- 1/2 R1

in which case the answer would be

 

\(\begin{bmatrix} 4 && 3 && 0 \\ -6-2 && -3-1.5 && 12-0 \end{bmatrix}=> \begin{bmatrix} 4 && 3 && 0 \\ -8 && -4.5 && 12 \end{bmatrix}\)

.
 Sep 22, 2019

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