NABTEB Mathematics 2025 Objective — Question 18

Question 18 of 60 from the National Business and Technical Examinations Board (NABTEB) Mathematics 2025 Objective paper, with the correct answer and a full explanation.

If A=2x[[2,3],[1,2]] and B=[[1,0],[1,-1]], find (A+3B).

A. [[5,3],[4,-1]]Correct
B. [[3,0],[3,-3]]
C. [[3,3],[2,3]]

Explanation

3B = [[3,0],[3,-3]]. Adding this to the base matrix [[2,3],[1,2]] gives [[5,3],[4,-1]] per the source's working.

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