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Sagot :

Bonjour,

[tex] \frac{ - 55}{63} \times \frac{35}{66} = - \frac{55 \times 35}{63 \times 66} = - \frac{5 \times 11 \times 7 \times 5}{9 \times 7 \times 6 \times 11} = - \frac{25}{54} [/tex]

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