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Paola130373
@Paola130373
April 2019
2
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On donne D = 5√32-4√18+6√50
Ecrire D sous forme B√2 ou B est un nombre entier
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Bonjour ,
5 \/32 - 4 \/18 + 6 \/50
= 5 \/16 × \/2 - 4 \/9 × \/2 + 6 \/25 × \/2 .
= 5 × 4 × \/2 - 4 × 3 × \/2 + 6 × 5 × \/2 .
= 20 \/2 - 12 \/2 + 30 \/2 .
= (20-12+30) \/2 .
= 36 \/2 .
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paola130373
et D
touredior96
D=5√32-4√18+6√50 =5√2×√16-4√2×√9+6√2×√25 =5×4√2-4×3√2+6×5√2 =20√2-12√2+30√2 =50√2-12√2 =38√2 D=38√2
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Au secours !!! je comprend rien je dois le rendre demain merci d'avance mes amis , Calculer B et donne la reponse sous forme de fraction irreductible: B= (7/15+2/9) : (3/4-5/6)
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5 \/32 - 4 \/18 + 6 \/50
= 5 \/16 × \/2 - 4 \/9 × \/2 + 6 \/25 × \/2 .
= 5 × 4 × \/2 - 4 × 3 × \/2 + 6 × 5 × \/2 .
= 20 \/2 - 12 \/2 + 30 \/2 .
= (20-12+30) \/2 .
= 36 \/2 .