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If x = -9 is a root of |{:(x,3,7),(2,x,2...

If x = -9 is a root of `|{:(x,3,7),(2,x,2),(7,6,x):}|=0`, then other two roots are `".........."`.

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The correct Answer is:
`thereforex=2,x=-9 and x=7`
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