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garancegaucher
@garancegaucher
January 2021
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Bonjour !
Je voudrais savoir quelle est la forme développer de ça : (x+1)2 -x2
PS : le 2 c'est le carré j'arrive pas à le faire en petite lettre ! ;)
Merci avance !
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mohayati2006
(x+1)² -x² " (a+b)²=a²+2ab+b² "
=x²+2x+1-x²
=2x+1
(x+1)² -x² "a²-b²=(a-b)(a+b) "
=(x+1-x) (x+1+x)
=1(2x+1)
=2x+1
1 votes
Thanks 2
garancegaucher
Merci beaucoup ! ;)
mohayati2006
dr1 bon courage
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=x²+2x+1-x²
=2x+1
(x+1)² -x² "a²-b²=(a-b)(a+b) "
=(x+1-x) (x+1+x)
=1(2x+1)
=2x+1