Question
Find each determinant. Do not use a calculator.$$\operatorname{det}\left[\begin{array}{rr}3 & 4 \\5 & -2\end{array}\right]$$
Step 1
Step 1: The determinant of a 2x2 matrix is calculated as follows: $$\operatorname{det}\left[\begin{array}{rr}a & b \\c & d\end{array}\right] = ad - bc$$ Show more…
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