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WhiteN
@WhiteN
April 2019
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Bonjour j'ai besoin d'aide pour un exercice de mathematique niveau 3eme merci de votre aide !
1) Develloper et réduire l'expression : (2n+5) (2n-5) ou n est un nombre quelquconque
2) En utilisant la question 1, calculer 205 x 195
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nonotata
(2n +5)(2n-5)
4n²-10n+10n-25
4n²-25
205x195
(2x100+5)(2x100-5)
4(100)² -25
4x10 000 -25
40 000 -25
39 975
2 votes
Thanks 2
WhiteN
Merci beaucoup !
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Lista de comentários
4n²-10n+10n-25
4n²-25
205x195
(2x100+5)(2x100-5)
4(100)² -25
4x10 000 -25
40 000 -25
39 975