Sagot :
[tex]bonjour\\\\\\\\2 x + 9 = 0 \\2 x = - 9 \\x = - 9/2 \\\\\\5 - 4 x = 0 \\- 4 x = - 5 \\x = 5/4 \\\\\\2 x + 9 = 5\\2 x = 5 - 9 \\2 x = - 4 \\x = - 2 \\\\\\5 - 4 x = 1 \\- 4 x = 1 - 5 \\- 4 x = - 4 \\x = 1 \\\\\\[/tex]
Bonjour
Résoudre les équations suivante s :
2x+9=0
2x = - 9
x = - 9/2
5-4x=0
- 4x = - 5
x = 5/4
2x+9=5
2x = 5 - 9
2x = - 4
x = - 4/2
x = - 2
5-4x=1
- 4x = 1 - 5
- 4x = - 4
x = 4/4
x = 1.