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marieclaudedes
@marieclaudedes
June 2021
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Developer xcarree -(x-1)(x+1) puis calculer : 2 345 678 910 au carré - 2 345 678 909 fois 2 345 678 911
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ikrammaths
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X²-(x-1)(x+1)=x²- (x²-1²)=x²-x²+1=1
Alors on remplace x par le nombre 2 345 678 910 Ca va te donne 1 a la fin .
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marieclaudedes
merci j'ai compris
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marieclaudedes
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marieclaudedes
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Sans calculatrice, calculer 10 001carre
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Verified answer
X²-(x-1)(x+1)=x²- (x²-1²)=x²-x²+1=1Alors on remplace x par le nombre 2 345 678 910 Ca va te donne 1 a la fin .