Question 328555
 Find 5A + 3B. 
A = 
+2 -5
-5 2
5A =
10 -25
-25 10
---------
B = 
5 -2
2 -5 
3B = 
15 -6
6 -15
-----
5A + 3B = 
+25 -31
-19 -5