Answer: C - The value of x2⊠y2 is 1. Calculate x2 = 32 = 9 and y2 = ( − 1)2 = 1 and substitute in x2⊠y2 = x2 + y2 − x2 y2 = 9 + 1 − 9 × 1 = 10 − 9 = 1.

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If x = 3 and y = − 1, what is the value of x²⊠y², where x⊠y = x + y − xy?

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Answer: C - The value of x²⊠y² is 1. Calculate x² = 3² = 9 and y² = ( − 1)² = 1 and substitute in x²⊠y² = x² + y² − x² y² = 9 + 1 − 9 × 1 = 10 − 9 = 1.

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