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Factoriser a(x) = (-3x+8) (7x-4)-(-3x+8) (5-2x)

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VINS

bonjour,

A (x) = (-3 x+8) (7 x-4)-(-3 x+8) (5-2 x)

A = ( - 3 x + 8 ) ( 7 x - 4 - 5 + 2 x )

A = ( - 3 x + 8 ) ( 9 x - 9 )

A =  9 ( - 3 x + 8 ) ( x - 1 )