WAEC - Mathematics (2019 - No. 31)

Factorize completely; (2x + 2y)(x - y) + (2x - 2y)(x + y) 
4(x - y)(x + y)
(4(x - y)
2(x - y)(x + y)
2(x - y)

Explanation

(2x + 2y)(x - y) + (2x - 2y)(x - y)

2(x + y)(x - y) + 2(x - y)(x + y) 

4(x - y)(x + y) 

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