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Comment factoriser (2x-1) (2x-1) - (x-3) (x-3) ?

Répondre :

Bonjour,

a²-b² = (a-b) ( a+b)

a = (2x-1)

b = (x-3)

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

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

Comment factoriser

(2x-1) (2x-1) - (x-3) (x-3) ?

= ( 2 x - 1 )² - ( x - 3 )²

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

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