If a $ b = 2, where a $ b = a² – b, what is the value of a and b?

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1. The operation is defined by a \$ b = $a^2 - b$. So $a^2 - b = 2$.
2. Test option (a): $2^2 - 2 = 4 - 2 = 2$. This matches.
3. Check others: (b) $8^2-1=63$, (c) $4^2-5=11$, (d) $9^2-6=75$. None equal $2$.
4. So the correct pair is option (a).
FINAL_ANSWER: <a>

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