Chapitre 2: Développement Flashcards

1
Q

Quelle est la propiété de la distributivité simple

A

Pour tous nombres relatifs k, a, b

k x (a+b) = k x a + k x b
k x (a-b) = k x a - k x b

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2
Q

Quelle est la propiété de la double distributivité

A

Pour tous nombres relatifs a, b, c, d

(a + b) (c + d) = ac + ad + bc + bd

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3
Q

Quelles sont les identités remarquables

A
  • (a + b)² = 2ab + a² + b²
  • (a - b)² = 2ab - a² + b²
  • (a + b) (a - b) = a² - b²
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4
Q

résoudre (8-9) (8+9)

A

= 8² - 9²
= 64 - 81
= -17

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5
Q

résoudre (45 + 10)²

A

= 45² + 2 x 45 x 10 + 10 ²
= 2025 + 900 + 100
= 3025

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