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Find the determinant of the following matrix​.

-2
10
2

Find the determinant of the following matrix​. -2 10 2-example-1

1 Answer

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A=\begin{bmatrix} 1&-2\\3&4 \end{bmatrix}\hspace{3em}|A|=(1)(4)~~ - ~~(3)(-2)\implies |A|=4+6\implies |A|=10