Question

Let `A={:[(2,-1),(1,7),(3,5)]:}_(3xx2)and{:[(-5,6,4),(9,11,8)]:}_(2xx3)` Find AB

Answer 1

`AB={:[(2(-5)(-1)9,2(6)+(-1)(11),2(4)+(-1)(8),),(1(-5)+7(9),(1)6+7(11),(1)4+7(8),),(3(-5)+5(9),(3)6+(5)11,3(4)+(5)8,)]:}_(3xx3)`
`AB={:[(-10+(-9),12+(-11),8+(-8),),(-5+63,6+77,4+56,),(-15+45,18+55,12+40,)]:}_(3xx3)={:[(-19,1,0),(58,83,60),(30,73,52)]:}_(3xx3)`