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Applied Mathematics · 2025 · 1 mark
CBSE 2025 · Central · Set 4 · Q5
If |2 x, 5; 4, x| = |3, 5; 4, 6|, then the value of x is
If $\displaystyle \left|\begin{array}{cc}2 x & 5 \\ 4 & x\end{array}\right|=\left|\begin{array}{ll}3 & 5 \\ 4 & 6\end{array}\right|$, then the value of $\displaystyle x$ is
Official answer
(D)
$\displaystyle \pm 3$
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CBSE Class 12 Applied 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.