6m^2+n-6mn-m

Question

factor by grouping

Answer 1

6m^2 - 6mn + n - m  :  Rewrite the terms in an order which allows at least a pair of terms to be factored.

6m(m - n) - (m - n)    :  Factor each set of terms such that the same factor is inside each set of ( )

(6m - 1)(m - n)          :  Factor the (m - n)