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Sagot :

Bonjour

Factoriser cette expression :

(x-2)(2x-3) - (2x-4)(9-x)

= (x - 2) (2x - 3) - 2 (x - 2) (9 - x)

= (x - 2) (2x - 3 - 9 + 2x)

= (x - 2) (4x - 21)

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