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If Δ is an operation such that for integers a and b we have a Δ b = a × a + b × b – a × b, then find (–3) Δ 2.

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–3 Δ 2 = (–3) × (–3) + 2 × 2 – (–3) × 2

= 9 + 4 – ( – 6) = 13 + 6 = 19.

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