Réponse:
B =
[tex] \frac{ \frac{4}{7} - \frac{14}{7} }{ \frac{28}{14} - \frac{11}{14} } = \frac{ \frac{ - 10}{7} }{ \frac{17}{14} } = - \frac{ 10}{7} \times \frac{14}{17} = - \frac{20}{17} [/tex]
C =
[tex] \frac{30 \times {10}^{5} + 6 \times {10}^{5} }{15 \times {10}^{7} } = \frac{36 \times {10}^{5} }{15 \times {10}^{7} } = \frac{36}{15} \times {10}^{5 - 7} = [/tex]
[tex] 2.4 \times {10}^{ - 2} = 24 \times {10}^{ - 3} [/tex]
