bonjour
exo 4
1 ) = - 12 + 10 = - 2
2) = 18 : 10 = 1.8
3 ) 100 + 49 = 149
4 ) 6 + 7 = 13
5) 9 * 4 = 36
6 ) 20 + 14 = 34
le 5 , tu fais pareil, il suffit de lire la consigne
R = 5 - ( 2 x² + 3 ) - ( 2 x - 1 )
R = 5 - 2 x² - 3 - 2 x + 1 = - 2 x² - 2 x + 3
S = - 2 x ( x + 1 ) + 3
S = - 2 x² - 2 x + 3