bonjour, j’ai besoin d’aide s’il vous plaît
2. Factoriser les expressions :
C = (2c + 5)(3-c)+(3-c)(6c - 1)
D = (3n-7)² - 16n²
2. Factoriser les expressions :
C = (2c + 5)(3-c)+(3-c)(6c - 1)
D = (3n-7)² - 16n²
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Bonjour
C = (3-c)(2c+5 + 6c-1) = (3-c)(8c+4) = 4(3-c)(2c+1)
D = (3n-7)² - 16n² = (3n-7)² - (4n)² = (3n-7 - 4n)(3n-7 + 4n) = (-n-7)(7n-7)
D = -7(n+7)(n-1)