Use the Matrix-Tree Formula to compute for any . Can you find a combinatorial argument for your answer?

This is for a Graph Theory class, and I approached the problem by first finding that the cofactors of and the cofactors of .

But once the matrices started to get larger, I had trouble finding determinants and wondered if I was even on the right track or if there is a much simpler way to find these cofactors. Any help would be much appreciated!