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WAEC - Mathematics (2010 - No. 2)

Factorize: x + y - ax = ay
(x - y)(1 - a)
(x + y)(1 + a)
(x + y)(1 - a)
(x - y)(1 + a)

Explanation

x + y - ax = ay

= (x + y) -a(x + y) = (x + y)(1 - a)

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