Question 938474
{{{A=(matrix(2,2,1,2,3,-1))}}}
{{{abs(A)=-7}}}
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{{{A[x]=(matrix(2,2,1,2,10,-1))}}}
{{{abs(A[x])=-21}}}
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{{{A[y]=(matrix(2,2,1,1,3,10))}}}
{{{abs(A[y])=7}}}
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{{{x=abs(A[x])/abs(A)=-21/(-7)=3}}}
{{{y=abs(A[y])/abs(A)=7/(-7)=-1}}}