Salut ! :)
Exercice 9
[tex]A = 2\times(12-2\times(12-(12-2)))-12+2[/tex]
[tex]A = 2\times(12-2\times(12-10))-12+2[/tex]
[tex]A = 2\times(12-2\times2)-12+2[/tex]
[tex]A = 2\times(12-4)-12+2[/tex]
[tex]A = 2\times8-12+2[/tex]
[tex]A = 16-12+2[/tex]
[tex]A = 4+2[/tex]
[tex]A = 6[/tex]
[tex]B = 4\times5-3+ \frac{640}{(12-2\times2)\times(13-5)} [/tex]
[tex]B = 20-3+ \frac{640}{(12-4)\times8} [/tex]
[tex]B = 17+ \frac{640}{8\times8} [/tex]
[tex]B = 17+ \frac{640}{64} [/tex]
[tex]B = 17+ 10[/tex]
[tex]B = 27[/tex]
Voilà, j'espère t'avoir aidé. :)
