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3 votes
Matrix Question PLEASE

Matrix Question PLEASE-example-1
User Krule
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1 Answer

5 votes
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
User Fatouma
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