Well the second one is easy because there are rows and columns that are almost entirely composed of zeroes.
Here I have two matrices that I would like help with, in calculating its' determinant!
The first one gotta have a nice trick to it, I am sure that going the longer way is not the only way!
Thanks in advance!
For the first one you can do R1 goes to R1+R2+R3+R4 or C1 goes to C1+C2+C3+C4 and you will find that all the elements of R1 OR C1 will become (a+b+c+d). take it common and proceed now you will have all 1s in one Row / column