Bonjour,
Développer l’expression:
(x+1)² - (x-1)²= x²+2x+1-(x²-2x+1)= x²+2x+1-x²+2x-1= 4x
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Bonjour,
Développer l’expression:
(x+1)² - (x-1)²= x²+2x+1-(x²-2x+1)= x²+2x+1-x²+2x-1= 4x