Q10 of 127 Page 141

Evaluate

Let Δ =

Applying Row transformations


R2→ R2 – R1; R3→ R3 – R1


Δ =


Δ =


Now, Expanding along C1


Δ = 1 (y × x – 0 × 0) – 0 (x × x – 0 × y) + 0 (x × 0 – y × y)


Δ = 1 (xy) – 0 + 0


Δ = xy


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