Let (*) be a binary operation on a natural number defined by a * b
MATHEMATICS
JAMB 2022
Let (*) be a binary operation on a natural number defined by a * b = a - b + (ab)2, then find 3 * 5
- A. 223
- B. 232
- C. 32
- D. -232
Correct Answer: A. 223
Explanation
3 * 5 = 3 - 5 + (3 x 5)\(^2\)
-2 + (15)\(^2\)
-2 + 225
= 223
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