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Exercice 3 : Factoriser les expressions
g) (x + 1)2-(3x - 2)2
f) (4x - 3)2 – (x + 1)2

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( x + 1 )² -  (3 x - 2 )²

= ( x + 1 + 3 x - 2 ) ( x + 1 - 3 x + 2 )

= ( 4 x - 1 ) ( - 2 x + 3 )

( 4 x -  3 )² - ( x + 1 )²

= ( 4 x - 3 + x + 1 ) ( 4 x - 3 - x - 1)

= ( 5 x - 2 ) ( 3 x - 4 )