bonjour
(5x - 5) (4x + 8) - 2 (5x-5)
= ( 5 x - 5 ) ( 4 x + 8 - 2 )
= ( 5 x - 5 ) ( 4 x + 6 )
(4x - 6) (5x + 2) - (4x - 6) (9x + 2)
= ( 4 x - 6 ) ( 5 x + 2 - 9 x - 2 )
= ( 4 x - 6 ) ( - 4 x )
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bonjour
(5x - 5) (4x + 8) - 2 (5x-5)
= ( 5 x - 5 ) ( 4 x + 8 - 2 )
= ( 5 x - 5 ) ( 4 x + 6 )
(4x - 6) (5x + 2) - (4x - 6) (9x + 2)
= ( 4 x - 6 ) ( 5 x + 2 - 9 x - 2 )
= ( 4 x - 6 ) ( - 4 x )