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Q7 of 110 Page 270

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To find: Value of

We have,

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Applying

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Applying

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Taking 4 common from R₁

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Applying

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Taking -2 common from R₁

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Applying

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Applying

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Taking 9 common from R₁

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Expanding along R₁

⇒ -8 [1[(3)(43)-(16)(0)] – 0 [(4)(43)-(0)(0)] - 2 [(4)(16)-(3)(0)]]

⇒ -8 [[(129)-(0)] - 2 [(64)-(0)]]

⇒ -8 [129 – 128]

⇒ -8

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