Fill in the blanks If \( x=-9 \) is a root of \( \left|\begin{array...

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Fill in the blanks
If \( x=-9 \) is a root of \( \left|\begin{array}{lll}x & 3 & 7 \\ 2 & x & 2 \\ 7 & 6 & x\end{array}\right|=0 \), then other two roots are
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