Resposta:
2*5-a=2 ==>a= 10-2=8
2*2-b=-2 ==>b=4+2=6
2*(-1)-c=0 ==>c= -2
2*1-d=1 ==>d=2-1=1
X=
8 6
-2 1
det(X)= 8*1-(-2)*6
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Resposta:
2*5-a=2 ==>a= 10-2=8
2*2-b=-2 ==>b=4+2=6
2*(-1)-c=0 ==>c= -2
2*1-d=1 ==>d=2-1=1
X=
8 6
-2 1
det(X)= 8*1-(-2)*6
det(X)=8 +12 =20