Question

O determinante da matriz $\left[\begin{array}{cc}2&3\\4&-5\end{array}\right]$ é:

a) – 10
b) 22
c ) 10
d) -22

Answer 1

$\huge\begin{vmatrix}2&3\\4&-5\end{vmatrix}$

$\mathsf{2.(-5)-3.4=-10-12=-22}$