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trapecia [35]
3 years ago
13

Matrix Question PLEASE

Mathematics
1 answer:
natka813 [3]3 years ago
6 0
Make into matrix
\left[\begin{array}{ccc}2&1&1\\1&-3&-1\\4&5&2\end{array}\right] =  \left[\begin{array}{ccc}-2\\14\\-4\end{array}\right]

accoring to cramer's rule
replace the y collum with eh constant collumn and find the detterminant

\left[\begin{array}{ccc}2&-2&1\\1&-14&-1\\4&-4&2\end{array}\right]
det
2 \left[\begin{array}{ccc}14&-1\\-4&2\end{array}\right]-(-2)   \left[\begin{array}{ccc}1&-1\\4&2\end{array}\right]+1    \left[\begin{array}{ccc}1&14\\4&-4\end{array}\right] 


dunno wat fraction is

pick last option
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I hope this helps!
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