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FamilyS
@FamilyS
January 2021
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Bonjour tout le monde,
Je suis en 5°.
J'ai un travail sur les puissances. Je l'ai déjà fait, j'aimerais une vérification de mes réponses s'il vous plaît, merci.
Développe les expressions suivantes :
A = 3 × ( 2x + 5 ) + 9(4x + 6)
→ 6x + 15 + 36x + 54
B = 2 × (7 + 11x) + 7 × (11 - 2x)
→ 14 + 22x + 77 - 14x
C = 2x²(x + 5x⁴ + 2) + 7x⁴(2x³ + 3x + 9)
→ 2x³ + 10x^6 + 4x² + 14x^7 + 21x^5 + 63x⁴
D = 5(x⁴ + x³ + 2x) + 2x²(x² + 3)
→ 5x⁴ + 5x³ + 10x + 2x⁴ + 6x²
^ signifie puissance.
Merci et bonne journée :)
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Bonjour, Lorsqu'on a des expressions telles que : (3x + 4)(7 - 2x) Comment fait-on pour placer les signes ? Merci et bon dimanche :)
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