Minta bantuannya yaa :)

Materi : Matriks
Bahasan : Operasi Matriks
Jawaban : 2

Langkah - langkah :
[tex]AB = \left[\begin{array}{ccc}x&2\\1&3\end{array}\right] \left[\begin{array}{ccc}1&4\\1&0\end{array}\right] \\ \\ \\ AB = \left[\begin{array}{ccc}x + 2&4x + 0\\1 + 3&4+0\end{array}\right] \\ \\\\ AB = \left[\begin{array}{ccc}x + 2&4x\\4&4\end{array}\right] \\ \\ |AB| = (4(x + 2)) - (4)4x \\ \\ |AB| = 4x + 8 - 16x \\ \\ 4x + 8 - 16x = - 16 \\ \\ - 12x = - 24 \\ \\ x = 2[/tex]