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Bonjour, je dois factoriser 25x²-49+(5x-7)(5x+7)
Merci


Répondre :

hello
25x²-49+(5x-7)(5x+7)=(5x)²-7²+(5x-7)(5x+7)=(5x-7)(5x+7)+(5x-7)(5x+7)= (5x+7) (5x-7)(1+1)= 2(5x+7)(5x-7)

bonjour

25x²-49+(5x-7)(5x+7)

(5x-7)(5x+7) +(5x-7)(5x+7)

(5x-7)(5x+7+5x+7)

(5x-7)(10x+14)   

2(5x-7)(5x+7)