Math Question
![Find the product or type "impossible"
\( \left[\begin{array}{l}4 \\ 9 \\ 7\end{array}\right]\left[\begin{array}{lll}1 & -2 & 1\end{array}\right] \)
\( \left[\begin{array}{ccc}4 & -8 & 4 \\ 9 & -18 & 9 \\ {[?]} & {[\quad]} & {[]}\end{array}\right] \)](https://d3hlidq5bf9vg0.cloudfront.net/app-server-student/2022/4/1/885a22d8-f1a5-441a-9f04-0178a8dfb6ec.png "Find the product or type \"impossible\"
\( \left[\begin{array}{l}4 \\ 9 \\ 7\end{array}\right]\left[\begin{array}{lll}1 & -2 & 1\end{array}\right] \)
\( \left[\begin{array}{ccc}4 & -8 & 4 \\ 9 & -18 & 9 \\ {[?]} & {[\quad]} & {[]}\end{array}\right] \)")
Solution
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