Respuesta :
Answer:
(3 -k)(m +k)
Step-by-step explanation:
Group the terms in pairs, factor each pair, then pull out the common factor from that result.
(3m -mk) +(3k -k²)
= m(3 -k) +k(3 -k) . . . . . (3-k) is a factor common to both terms
= (3 -k)(m +k)