Let A be a 2 x 3 matrix where as B be a 3 x2 matrix. If det. (AB) = 4, then the value of det. (BA) is

A=a1    a2    a3a4    a5    a5,B=b1    b2b3    b4b5    b6So, det (BA)=b1a1+b2a4    b1a2+b2a5    b1a3+b2a5b3a1+b4a4    b3a2+b4a5    b3a3+b4a5b5a1+b6a4    b5a2+b6a5    b5a3+b6a5=a1    a2    a3a4    a5    a60    0    0×b1    b2    0b3    b4    0b5    b6    0=0                          (column by row)