Question
Fill in the blanks with correct number
$\left|\begin{array}{ll}3 & 2 \\ 4 & 5\end{array}\right|=3 \times \square-\square \times 4=\square-8=\square$

Answer

$\left|\begin{array}{ll}3 & 2 \\ 4 & 5\end{array}\right|=3 \times 5 - 2 \times 4 =15-8=7$

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