imo class 12 matrices

If A is a square matrix of order 2 and |A| = −2, then ||A|A| is equal to:

VAVidaara Admin Asked 6d ago 0 views 0 answers

If A is a square matrix of order 2 and |A| = −2, then ||A|A| is equal to:

  • A. −8
  • B. 8
  • C. −4
  • D. 4

Answer: A) −8

Explanation: |A| = −2. The matrix |A|A = −2A. Its determinant is |−2A| = (−2)²|A| = 4 × (−2) = −8.

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