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प्रश्न
If `|( 4,5), (m , 3)|` = 22, then find the value of m.
उत्तर
Given, `|( 4,5), (m , 3)|` = 22
⇒ (4 × 3) – (m × 5) = 22
⇒ 12 – 5m = 22
⇒ – 5m = 22 – 12
⇒ – 5m = 10
⇒ m = `- 10/5`
∴ m = – 2
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