MathematicsBinary operationsJAMB
The operation ∘ is defined by a ∘ b = a² + 2b. Find x if x ∘ 3 = 22.
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Answer: B. ±4
x² + 6 = 22 gives x² = 16, so x = ±4.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.