tolong ya tentang matrix ini.

1) X = [2 -1]
[3 5]
2)Y = [1 3]
[5 7]

1)det(X) = 10 - (-3)
= 13
invers X = 1/13.[5 1 ]
[-3 2]
= [5/13 1/13 ]
[-3/13 2/13]

2)det(Y) = 7 - 15
= -8
invers Y = 1/-8.[7 -3]
[-5 1 ]
= [7/-8 3/8]
[5/8 1/-8 ]

kalau ada yg ndak paham tanya ya dek :)