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Question
Solve the matrix equations:
`[1 2 1] [[1,2,0],[2,0,1],[1,0 ,2]][[0],[2],[x]]=0`
Solution
[1 2 1] `[[1,2,0],[2,0,1],[1,0,2]] [[0],[2],[x]]=0`
⇒[1+4+1 2+0+0 0+2+2] `[[0],[2],[x]]=0`
⇒[6 2 4] `[[0],[2],[x]]=0`
⇒[0+4+4x]=0
⇒4+4x=0
⇒4x=−4
∴ `x=(-4)/4 =-1`
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