Question

a traces of AandB are20 and-8 then tha traces(A+B) is​

Answer 1

Answer:

the trace of an n×n square matrix A is defined to be the sum of the elements on the main diagonal (the diagonal from the upper left to the lower right) of A

the traces of A,B are 20 and −8, then the trace of A+B is trac(A+B)=trace(A)+trac(B)=20+−8=12