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SURIMING
@SURIMING
May 2019
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Ouvez vouss m'aidez svp
exercice 4 :
-Développer et reduire l’expression : (n+4)*(n-4)
-En utlisent le resultat précedent , calculer (sans calculatrace) 74*66
-De la meme facon calculer 104*96 puis 240*232
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Verified answer
(n+4)*(n-4) = n²-4n+4n-16 = n²-16
74*66
= (70+4)*(70-4) = 70²-16 = 4900-16 = 4884
104*96
= (100+4)*(100-4) = 100²-16 = 10000-16 = 9984
240*232
= (236+4)*(236-4) = 236²-16 = 55696-16 = 55680
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Verified answer
(n+4)*(n-4) = n²-4n+4n-16 = n²-1674*66
= (70+4)*(70-4) = 70²-16 = 4900-16 = 4884
104*96
= (100+4)*(100-4) = 100²-16 = 10000-16 = 9984
240*232
= (236+4)*(236-4) = 236²-16 = 55696-16 = 55680