[tex]A=11:( \frac{2}{3} - \frac{5}{2} )=11:( \frac{4}{6} - \frac{15}{6} )= 11*( -\frac{6}{11} )=-6[/tex]
[tex]B= \frac{2,9*10^2-1,7*10^2}{0,2*10^5} =\frac{(2,9-1,7)*10^2*10^-^5}{0,2}= \frac{1,2*10^-^3}{0,2} =6*10^-^3[/tex]
[tex]C= \sqrt{150}-2 \sqrt{600} = \sqrt{25*6}-2 \sqrt{100*6} =5 \sqrt{6} -2*10 \sqrt{6} =5 \sqrt{6} -20 \sqrt{6} =-15 \sqrt{6} [/tex]
J'espère que tu as compris
a+
