Class 12 Matrices · Conceptual Answer1 Marksmatrix_polynomials
Class 12 Maths · Matrices · Conceptual Answer #85
If A²=A, simplify (I+A)³−7A.
✅ Step-by-Step Solution
Final Answer: I
- Expand (I+A)³=I+3A+3A²+A³=I+7A because A²=A and A³=A.
- I
📋 CBSE Stepwise Marking Scheme
- [0.5 marks] Expand (I+A)³=I+3A+3A²+A³=I+7A because A²=A and A³=A.
- [0.5 marks] I
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