MathematicsPolynomialsJAMB
For what value of k does x² − 4x + k = 0 have equal roots?
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Answer: C. 4
Equal roots need b² − 4ac = 0: 16 − 4k = 0, so k = 4.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.