If Δ₁ = | 1 p q | | 1 q r | | 1 r p | and Δ₂ = | 1 1 1 | | q r p | | r p q | where p ≠ q ≠ r, then Δ₁ + Δ₂ is - NDA Mathematics 2022 (I)

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If Δ₁ = | 1 p q | | 1 q r | | 1 r p | and Δ₂ = | 1 1 1 | | q r p | | r p q | where p ≠ q ≠ r, then Δ₁ + Δ₂ is