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Sagot :

VINS

bonjour

x

x + 1

( x + 1 )² = x² + 2 x + 1

x² + 2 x + 1 - x² = 2 x + 1

2 x + 1

on prend 1 , on obtient : 2 + 1 = 3

on prend - 7 , on obtient : - 14 + 1 = - 13

on prend 12.4 , on obtient : 2 * 12.4+ 1 = 24.8 + 1 = 25.8

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