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Weeedyxx
@Weeedyxx
May 2019
2
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Bonsoir c'est pour un exo de maths 3eme
("V" c'est racine carré) :
V18 * V32 * V8
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Sallycr
V18 = 4,242641
V32=5,656854
V8 =2,828427
0 votes
Thanks 0
weeedyxx
Merci bcp mais il me faut un resultat sous forme de racine carré du genre aVb
Sallycr
Ahh, d'accord hum , ça parcontre jsais plus comment on fait , si je trouve tout à lheure j'te dis
taalbabachir
√18 * √ 32 * √8
On sait que √a x b x c = √a x √b x √c
√18 = √2 x 9
√32 = √ 4 x 8
on écrit : √2 x 9 x √4 x 8 x √8 = √2 x 9 x 4 x 8 x 8 = √2 x 3² x 2² x 8²
= 3 x 2 x 8 √2 = 48√2
1 votes
Thanks 1
weeedyxx
Merci !
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V32=5,656854
V8 =2,828427
On sait que √a x b x c = √a x √b x √c
√18 = √2 x 9
√32 = √ 4 x 8
on écrit : √2 x 9 x √4 x 8 x √8 = √2 x 9 x 4 x 8 x 8 = √2 x 3² x 2² x 8²
= 3 x 2 x 8 √2 = 48√2