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Mathematics · 2026 · 1 mark
CBSE 2026 · Region 5 · Set 1 · Q2
If A is a square matrix such that A^2= A, then ( A - I )^3- A is equal to:
If A is a square matrix such that $\displaystyle \mathrm{A}^{2}=\mathrm{A}$, then $\displaystyle (\mathrm{A}-\mathrm{I})^{3}-\mathrm{A}$ is equal to :
Official answer
(B)
$\displaystyle -$I
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CBSE Class 12 Mathematics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.