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Verified answer
Bab MatriksMatematika SMA Kelas X
[3 p] determinannya = 9
[5 -2]
3 . (-2) - p . 5 = 9
-6 - 5p = 9
-5p = 9 + 6
p = 15/-5
p = -3
p² = (-3)²
= 9
jawabannya D