ab – mn + an – bm =? A. (a-b)(m-n) B. (a-m)(b+n) C. (a-n)(m+b)�

1.	ab – mn + an – bm =? A. (a-b)(m-n) B. (a-m)(b+n) C. (a-n)(m+b) D. (m-a)(n-b)
Answer» = ab – mn + an – bm = ab + an – mn – bm = a(b + n) – m(n + b) = (a – m)(b + n).

ab – mn + an – bm =? A. (a-b)(m-n) B. (a-m)(b+n) C. (a-n)(m+b) D. (m-a)(n-b)

Answer»

= ab – mn + an – bm = ab + an – mn – bm

= a(b + n) – m(n + b)

= (a – m)(b + n).