розкласти на множники 3m+mk-3n-kn
3m+mk-3n-kn = (3m - 3n)+(mk - kn) = 3(m-n)+k(m-n) = (m-n)(3+k)
3m+mk-3n-kn=m(3+k)-n(3+k)=(3+k)(m-n)
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3m+mk-3n-kn = (3m - 3n)+(mk - kn) = 3(m-n)+k(m-n) = (m-n)(3+k)
Verified answer
3m+mk-3n-kn=m(3+k)-n(3+k)=(3+k)(m-n)