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Sagot :

Bonjour,

(5+115)(15-73)
= 5*15 - 5*73 + 115*15 - 115 * 73
= 75 - 365 + 1725 - 8395
= - 6960

(15+12)(10-1)
= 15*10 - 15*1 + 10*12 - 12*1
= 150-15 + 120-12
= 135 + 108
= 243

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