Question

Factor jm + jn + km + kn. a) (j + k)(m + n) b)(j + m)(n + k) c) (n + j)(k + m)

Answer 1

jm + jn + km + kn
= j(m+n) +k(m+n)
=(m+n)(j+k)
answer is a) (j + k)(m + n) 

Answer 2

A, (j+k)(m+n)  you take the j out and then the k