Question

calcule a adicao e subtracao da matriz
a) (1   4)   (2   -1)
   (  0   7)+(0    2)=
b (3   0)   (1   2)
   (4  -7)-  (0  -2)=

Answer 1

$a) \left|\begin{array}{ccc}1&4\\0&7\\\end{array}\right|+ \left|\begin{array}{ccc}2&-1\\0&2\\\end{array}\right|~\to~\left|\begin{array}{ccc}1+2&4+(-1)\\0+0&2+7\\\end{array}\right|~\to \left|\begin{array}{ccc}3&3\\0&9\\\end{array}\right|$


$b) \left|\begin{array}{ccc}3&0\\4&-7\\\end{array}\right|- \left|\begin{array}{ccc}1&2\\0&-2\\\end{array}\right|~\to \left|\begin{array}{ccc}3-1&0-2\\4-0&-7-(-2)\\\end{array}\right|~\to \left|\begin{array}{ccc}2&-2\\4&-5\\\end{array}\right|$


Espero ter ajudado e tenha bons estudos :)