Evaluate :
[R1’ = R1 - R2]
[R2’ = 2R2]
[R2’ = R2 - R3]
[R3’ = 2R3]
= 4(8 × 23 - 8 × 27) - 5{8 × 
- ( - 13) × 23} - 5{( - 13) × 27 - 8 × 
}
[expansion by first row]
= 132
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Generated by AI. May contain inaccuracies — always verify with your textbook.
