Bonjour, je peux t'aider pour la dernière question.
E = [tex] \frac{1}{3}+ \frac{2}{21}- \frac{5}{7} [/tex]
=[tex] \frac{7}{21}+ \frac{2}{21}- \frac{5}{7} [/tex]
=[tex] \frac{9}{21}- \frac{5}{7} [/tex]
=[tex] \frac{9}{21}- \frac{15}{21} [/tex]
=[tex] -\frac{6}{21} [/tex]
=[tex]- \frac{2}{7} [/tex] <== SIMPLIFIER
F = [tex] \frac{5}{8}- \frac{3}{4}* \frac{16}{9}[/tex]
=[tex] \frac{5}{8}- \frac{48}{36} [/tex]
=[tex] \frac{45}{72}- \frac{96}{72} [/tex]
=[tex]- \frac{17}{24} [/tex] <== SIMPLIFIER
G = [tex] \frac{45}{28}: (-\frac{15}{7}) [/tex]
=[tex] \frac{45}{28}* (-\frac{7}{15})[/tex]
=[tex] -\frac{3}{4} [/tex] <== SIMPLIFIER
