Question

Find the inverse of the following matrix

2 5
-3 1

Answer 1

Answer:

$x {}^{ - 1} = \frac{adj \: (x)}{ |x| } \\ \\ adj \:( x ) \: = [\begin{matrix} 1& 3\\ - 5&2\: \end {matrix} ]\\ \\ |x| = 2 - ( - 15) = 17$

Answer 2

Answer:

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