Question

dada as matriz
A=1 3
0 -2
b=4 -1
1 2
calcule
a=a.b
b=b.a

Answer 1

A=1×4=4 ,A= 1×(-1)=-1, A=1×1=1 A= 1×2 =2 , A= 3×4=12, A= 3×(-1)= -3 , A= 3× 1=3 , A=3×2= 6 ,A=0×4=0,A=0×(-1)=0 ,A=0×1=0 , A= 0×2=0, A=-2×4=-8 A=-2×(-1)=2 A=-2×1=-2 A=-2×2=-4
B=4×1= 4 ,B = 4×3=12 ,B= 4×0=0, B=4×(-1) ,B=-1×1=-1, B=-1×3=-3 ,B= -1×0=0 , B=-1×(-2)=2 , B =1×1=1 , B= 1×3=3 , B=1×0=0 , B=1×(-2)=-2 , B=2×1=2 , B=2×3=6 , B=2×0=0 ,B=2×(-2)=-4