MathematicsNumber basesJAMB
Find x if 132ₓ = 42 (base ten).
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Answer: B. 5
x² + 3x + 2 = 42 gives x² + 3x − 40 = 0, so (x + 8)(x − 5) = 0 and x = 5.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.