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For what values of x:[(1,2,1)][(1,2,0),(...

For what values of `x:[(1,2,1)][(1,2,0),(2,0,1),(1,0,2)][(0),(2),(x)]=O`?

Text Solution

Verified by Experts

The correct Answer is:
x=-1
We have
`[(1,2,1)][(1,2,0),(2,0,1),(1,0,2)][(0),(2),(x)]=0`
or `[(1+4+1,2+0+0,0+2+2)][(0),(2),(x)]=0`
or `[6(0)+2(2)+4(x)]=0`
or `[4+4x]=[0]`
or `4+4x=0`
or `x=-1`
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