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kxhx
@kxhx
January 2021
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Bonjour j'aurais besoin d'aide pour un exercice ou j'ai beaucoup de difficultés je mais la photo merci. C'est l'exercice 2
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Az2Poivron
Salut !
1) (b+c)²+(b-c²)=b²+2bc+c²+b²-2bc+c² = 2b²+2c² = 2(b²+c²)
2)(AC=8 et AB=6)
d'apres la question precedente :
(AC + AB)² + (AC - AB)² = 2(AB²+AC²)
BC²= AB²+AC²
donc
BC²=
BC²=(14+2)²/2
BC²=16²/2
BC=
je n'ai pas de calculatrice :'(
1 votes
Thanks 1
kxhx
Du coup ta pas fini l'exercice ?
kxhx
Ou je dois calculer le dernoert
kxhx
Dernier
Az2Poivron
bah tu fais la racine carré de la fin et ça te donne la longeur de BC ;)
kxhx
OK mercit
Az2Poivron
ça fait 10 je croit
kxhx
OK je vérifie demain
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1) (b+c)²+(b-c²)=b²+2bc+c²+b²-2bc+c² = 2b²+2c² = 2(b²+c²)
2)(AC=8 et AB=6)
d'apres la question precedente :
(AC + AB)² + (AC - AB)² = 2(AB²+AC²)
BC²= AB²+AC²
donc
BC²=
BC²=(14+2)²/2
BC²=16²/2
BC=
je n'ai pas de calculatrice :'(