Bonjour Alyxvegas
[tex]D=(\dfrac{-8}{21})\times(\dfrac{21}{-8})=1[/tex]
[tex]E=(\dfrac{-100}{10})\times(\dfrac{7}{14})=-5[/tex]
[tex]F=(\dfrac{-6}{-9})\times(\dfrac{2}{5})=\dfrac{4}{15}[/tex]
[tex]G=(\dfrac{-5}{3})\times(\dfrac{3}{-14})\times(\dfrac{-20}{25})=\dfrac{-2}{7}[/tex]
