Question

Sejam A= (-4 3) e B= (1 0) Calcule o determinante das matrizes:
                (1 2)         (-1 3)


a) A-B       b)A+2B     c) A.B

Answer 1

A) A-B = $\left[\begin{array}{ccc}-5&3&\\2&-1&\\&&\end{array}\right]$

B) A+2B = $\left[\begin{array}{ccc}-2&3&\\-1&8&\\&&\end{array}\right]$

C) A.B = $\left[\begin{array}{ccc}-4&0&\\-1&6&\\&&\end{array}\right]$