\(N\left(2N-3\right)-2N\left(N+1\right)=2N^2-3N-2N^2-2N=-5N⋮5\)
\(n\left(2n-3\right)-2n\left(n+1\right)\)
\(=2n^2-3n-2n^2-2n\)
\(=\left(2n^2-2n^2\right)-\left(3n-2n\right)\)
\(=0-5n\)
\(=-5n⋮5\)
\(n\left(2n-3\right)-2n\left(n+1\right)\)
\(=2n^2-3n-2n^2-2n\)
\(=\left(2n^2-2n^2\right)-\left(3n+2n\right)\)
\(=-5n⋮5\)
\(n\left(2n-3\right)-2n\left(n+1\right)\)
\(=2n^2-3n-2n^2-2n\)
\(=-5n\)
\(⋮5\)