Question 1161696
<pre>
A=[ 5 0 -9       
   -5 6  2] 
  
B=[2  7                  
  -2 -4]

C=[-8 -2  7
   -3 -5 -2            
    9 -1 -5]          

D=[2 -8
   8 -9
   3  7]

B+AD=?

{{{matrix(13,4,

B,""+"", A*D,""="",

"","","","",


(matrix(2,2,2,7,-2,-4)),""+"",(matrix(2,3,5,0,-9,-5,6,2))*(matrix(3,2,2,-8,8,-9,3,7)),""="",

"","","","",

(matrix(2,2,2,7,-2,-4)),
""+"",
(matrix(2,4,5*2+0*8+(-9)*3, "","",5*(-8)+0*(-9)+(-9)*7,(-5)*2+6*8+2*3, "","",(-5)*(-8)+6*(-9)+2*7)),""="",

"","","","",

(matrix(2,2,2,7,-2,-4)),""+"",(matrix(2,3,10+0-27,"",-40+0-63,-10+48+6,"",40-54+14)),""="",

"","","","",

(matrix(2,2,2,7,-2,-4)),""+"",(matrix(2,2,-17,-103,44,0)),""="",

"","","","",

(matrix(2,3,2-17,"",7-103,-2+44,"",-4+0)),""="","","",

"","","","",

(matrix(2,2,-15,-96,42,-4)),"","",""

 )}}}

Edwin</pre>