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Mathematics · 2025 · 1 mark
CBSE 2025 · Region 1 · Set 3 · Q6
If [x+y, 3 y; 3 x, x+3] = [9, 4 x+y; x+6, y], then (x-y)=?
If $\displaystyle \left[\begin{array}{cc}x+y & 3 y \\ 3 x & x+3\end{array}\right]=\left[\begin{array}{cc}9 & 4 x+y \\ x+6 & y\end{array}\right]$, then $\displaystyle (x-y)=$ ?
Official answer
(B)
$\displaystyle -3$
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CBSE Class 12 Mathematics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.