Question

ajuda a responder essa questão com urgencia 

Answer 1

 

 

 

3    - 3

 

-1     17  

 

 

3.17 - (-1)(-3)

 

51 - 3

 

48

Answer 2

primeiro elemento

 

$<var>\left[\begin{array}{cc}2\sqrt{5}&\sqrt{5}\\-3\sqrt{5}&4\sqrt{5}\\\end{array}\right].\left[\begin{array}{cc}2\sqrt{5}\\\sqrt{5}\\\end{array}\right]\\ \\ \\ 1º \ \termo\\ 2\sqrt{5}.2\sqrt{5}+\sqrt{5}\sqrt{5}\\ \\ 4.5+5=25 \\ \\ 2º \ \termo\\ \\ \\ -3\sqrt{5}.2\sqrt{5}+4\sqrt{5}\sqrt{5}\\ \\ -6.5+4.5=-30+20=-10\\ \left[\begin{array}{cc}25\\\(-10)\\\end{array}\right]\\ </var>$