MathematicsMatrices and determinantsJAMB
If A = [[2, 1], [3, 4]], find A².
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Answer: D. [[7, 6], [18, 19]]
Row × column: [2·2 + 1·3, 2·1 + 1·4; 3·2 + 4·3, 3·1 + 4·4] = [[7, 6], [18, 19]]. Squaring each entry is wrong.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.