You can put this solution on YOUR website! first multiply 2n and 3n u get 6n^2
next you multiply 2n and -1 u get -2n
then u multiply -5 and 3n u get -15n
finaly u multiply -5 and -1 so u get 5
put them in that order in 1 line
6n^2-2n-15n+5
simplify
6n^2-17n+5
and your done