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प्रश्न
Evaluate: `|(1, -3, 12),(0, 2, -4),(9, 7, 2)|`
उत्तर
`|(1, -3, 12),(0, 2, -4),(9, 7, 2)|`
= `1|(2, -4),(7, 2)| - (-3)|(0, -4),(9, 2)| + 12|(0, 2),(9, 7)|`
= 1(4 + 28) + 3(0 + 36) + 12(0 – 18)
= 1(32) + 3(36) + 12(– 18)
= 32 + 108 – 216
= – 76
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