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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)

Penjelasan

am + bn - an - bm

am - an - bm + bn

a(m - n) - b(m - n)

(a - b)(m - n)

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