∣35−46−3−5−221∣\begin{vmatrix} 3 & 5 & -4 \\ 6 & -3 & -5 \\ -2 & 2 & 1 \end{vmatrix}36−25−32−4−51
= 3(−3−(−10))−5(6−10)+(−4)(12−6)3(-3 - (-10)) - 5(6 - 10) + (-4)(12 - 6)3(−3−(−10))−5(6−10)+(−4)(12−6)
= 21+20−2421 + 20 - 2421+20−24
= 17
