CBSE Class 12 Mathematics 2026 Main Paper 65/5/1 · Q11 Marksmatrix_multiplication
CBSE Class 12 Mathematics 2026 Main Paper 65/5/1 · Question 1 (Matrices)
If A=[[-p,q],[r,p]] and A²=I, which equation holds?
✅ Step-by-Step Solution
Final Answer: 1−p²−qr=0
- Multiplication gives A²=(p²+qr)I. Equate the diagonal entries to 1.
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