Jika diketahui matriks A = (3 1) (3 2) dan B = (2 -1) (1 1) memenuhi AX = B, maka matriks X adalah...

jawab

AX = B
X = A⁻¹ . B

[tex]X\,=\, \frac{1}{3.2 - 3.1} \left[\begin{array}{ccc}2&-1\\-3&3\end{array}\right]\, \left[\begin{array}{ccc}2&-1\\1&1\end{array}\right] [/tex]


[tex]x= \left[\begin{array}{ccc}1&-1\\-1&2\end{array}\right][/tex]