Réponses

2014-10-29T16:08:16+01:00
A) x+4=11
x = 11 - 4
x = 7

b) x - 5=11
 x = 11 + 5
x = 16

c) x²+4=11
 x
² = 11 - 4
x² = 7
x = √7


   

Meilleure réponse !
2014-10-29T16:10:22+01:00
X + 4 = 11 
x = 11-4
x = 7

x - 5 = 11
x = 11 + 5
x = 16

x* + 4 = 11
x* = 11-4
x* = 7
x =  \sqrt{7}

x* - 5 = 11
x* = 11+5
x* = 16
x =  \sqrt{16}
x = 4

x* = 7
x =  \sqrt{7}