Bonjour,
1. Développer :
Double distributivité :
(a + b)(c + d) = ac + ad + bc + bd
A = (x - 2)(6 + x) - x² + 12
A = 6x + x² - 12 - 2x - x² + 12
A = 6x - 12 - 2x + 12
A = 6x - 2x
A = 4x ✅️
Bonne journée.
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Bonjour,
1. Développer :
Double distributivité :
(a + b)(c + d) = ac + ad + bc + bd
A = (x - 2)(6 + x) - x² + 12
A = 6x + x² - 12 - 2x - x² + 12
A = 6x - 12 - 2x + 12
A = 6x - 2x
A = 4x ✅️
Bonne journée.