6m^2 + 7mn + n^2 I really don't understand this one
so try something of form (6m+n)(m+n) = 6m(m+n) + n(m+n) = 6 m^2 + 6 mn + 1 mn + n^2 = 6 m^2 + 7 mn + n^2
You can ask a new question or answer this question.