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Applied Mathematics · 2023 · 1 mark
CBSE 2023 · Central · Set 4 · Q3
If A = [1, 0; -2, 1] and B = [-5, 10; -10, -5], then AB is:
If $\displaystyle \mathrm{A}=\left[\begin{array}{rr}1 & 0 \\ -2 & 1\end{array}\right]$ and $\displaystyle \mathrm{B}=\left[\begin{array}{rr}-5 & 10 \\ -10 & -5\end{array}\right]$, then AB is:
Official answer
(D)
$\displaystyle \left[\begin{array}{rr}-5 & 10 \\ 0 & -25\end{array}\right]$
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CBSE Class 12 Applied Mathematics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.