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Lareinedesneiges
@Lareinedesneiges
June 2021
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20 POINTS!!!!!!!!
La question b seulement
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jujitsuzakaria
(x-1)²+x²+(x+1)²=x²-2x+1+x²+x²+2x+1=3x²+2
(x-1)²+x²+(x+1)²=3x²+2
alors 3x²+2=1325
3x²=1323
x²=1323/3=441
x=21 ou x= -21
(x-1)²+x²+(x+1)²=20²+21²+22²=400+441+484=1325
alors les nombres sont 20,21 et 22!
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(x-1)²+x²+(x+1)²=3x²+2
alors 3x²+2=1325
3x²=1323
x²=1323/3=441
x=21 ou x= -21
(x-1)²+x²+(x+1)²=20²+21²+22²=400+441+484=1325
alors les nombres sont 20,21 et 22!