WAEC - Mathematics (2011 - No. 20)
Factorize the expression: am + bn - an - bm
(a - b)(m + n)
(a - b)(m - n)
(a + b)(m - n)
(a + b)(m + n)
Giải thích
am + bn - an - bm
am - an - bm + bn
a(m - n) - b(m - n)
(a - b)(m - n)
am - an - bm + bn
a(m - n) - b(m - n)
(a - b)(m - n)