Matrices: 3 marks Questions (CBSE Class 12)

3 different 3 marks questions on Matrices from CBSE Class 12 Maths board exams 2026, newest first.

If $A = 310240005$ , then compute $A^{2} - 7 A + 10 I$ .

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Answer:

A^{2} - 7 A + 10 I = O

(the

3 \times 3

zero matrix)

If $A = 122212221$ , then compute $A^{2} - 4 A - 5 I$ .

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Answer:

A^{2} - 4 A - 5 I = O

(the

3 \times 3

zero matrix)

If $A = 221 01 - 1 130$ , then compute $A^{2} - 5 A + 4 I$ .

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Answer:

- 1 - 1 - 5 - 1 - 3 4 - 3 - 10 2

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