on considère les expressions A et B A = 2puissance 3+2²x ( 2²x3-3²) B = (7²-7x5) :(7x2 puissance-3)-2² 1) caluculer A puis B en respectant les p

Bonjour Giovanny97215

[tex]1)\ A = 2^3+2^2\times( 2^2\times3-3^2)\\\\A = 8+4\times( 4\times3-9)\\\\A = 8+4\times( 12-9)\\\\A = 8+4\times3\\\\A = 8+12\\\\\boxed{A=20}[/tex]

[tex]B = (7^2-7\times5) :(7\times2^{-3})-2^2\\\\B = (49-35) :(7\times\dfrac{1}{2^{3}})-4\\\\B = 14 :\dfrac{7}{2^{3}}-4\\\\B = 14 :\dfrac{7}{8}-4\\\\B = 14 \times\dfrac{8}{7}-4\\\\B = 2\times7\times\dfrac{8}{7}-4\\\\B = 2\times8-4[/tex]

[tex]\\\\B = 16-4\\\\\boxed{B =12}[/tex]

[tex]2)\ A-B=20-12\\\\A-B=8\\\\\boxed{A-B=2^3}[/tex]