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DETERMINANTS — Maths STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceMathsDETERMINANTS1 Mark
Question
If $\begin{pmatrix} 2 & 3 \\ 5 & 7 \\ \end{pmatrix}\begin{pmatrix} 1 & -3 \\ -2 & 4 \\ \end{pmatrix}=\begin{pmatrix} -4 & 6 \\ -9 & x \\ \end{pmatrix}\text{ write the value of x.}$
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Answer

13.

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