Question

calcular os DETERMINANTES:

A) -4 8
1 -3


B) 8 √3
√3 -7

Answer 1

$\left[\begin{array}{cc}-4&8&\\1&-3&\end{array}\right] =(-4).(-3)-(1.8)=12-8=4$

$\left[\begin{array}{cc}8& \sqrt{3} &\\ \sqrt{3} &-7&\end{array}\right] =8.(-7)-(\sqrt{3}.\sqrt{3} )=-56 - 3 = -59$