Réponse :
A = -12/105
B = -23/96
C = 1
D = -13/270
Explications étape par étape
[tex]A = \frac{-2}{21} * \frac{14}{5} - \frac{8}{5} \\A = \frac{-2}{21} * \frac{14-8}{5}\\ A = \frac{-2}{21} * \frac{6}{5}\\ A = \frac{-12}{105}\\[/tex]
[tex]B = \frac{1}{4} + \frac{5}{3} * \frac{-1}{8}\\ B = \frac{3+20}{12} * \frac{-1}{8}\\ B = \frac{23}{12} * \frac{-1}{8}\\B = \frac{-23}{96}[/tex]
[tex]C = \frac{4}{-3} + \frac{-7}{6} * \frac{-2}{5}\\ C = \frac{-8-7}{6} * \frac{-2}{5}\\ C = \frac{-15}{6} * \frac{-2}{5} \\C = \frac{6}{6}\\ C = 1[/tex]
[tex]D = (\frac{8}{15} - \frac{7}{5}) * (\frac{-1}{6} + \frac{2}{9} )\\D = (\frac{8-21}{15} ) * (\frac{-3+4}{18})\\D = (\frac{-13}{15} ) * (\frac{1}{18})\\D = \frac{-13}{270}[/tex]
Pour de plus amples informations, veuillez consulter le lien ci-dessous:
https://nosdevoirs.fr/devoir/324250
