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प्रश्न
If A = `[(0, 4, 9),(8, 3, 7)]`, B = `[(7, 3, 8),(1, 4, 9)]` find the value of 3A – 9B
उत्तर
3A – 9B = `3[(0, 4, 9),(8, 3, 7)] - 9[(7, 3, 8),(1, 4, 9)]`
= `[(0, 12, 27),(24, 9, 21)] - [(63, 27, 72),(9, 36, 81)]`
= `[(-63, -5, -45),(15, -27, -60)]`
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