Réponse :
Explications étape par étape
Bonjour,
Factoriser :
A = c² - d²
B = x² - 100
C = 100 - 4x
D = -64x² + 16
Exercice 6 :
Factoriser :
A = (x +3)² - 25
A = (x + 3)² - 5²
A = (x + 3 - 5)(x + 3 + 5)
A = (x - 2)(x + 8)
B = 64 - (1 - x)²
B = 8² - (1 - x)²
B = (8 - 1 + x)(8 + 1 - x)
B = (x + 7)(-x + 9)
C = 49 - (2 + 3x)²
C = 7² - (2 + 3x)²
C = (7 - 2 - 3x)(7 + 2 + 3x)
C = (-3x + 5)(3x + 9)
C = (-3x + 5) * 3(x + 3)
C = 3(-3x + 5)(x + 3)
Exercice 7 :
Factoriser :
A = (3x - 1)² - 16
A = (3x - 1 - 4)(3x - 1 + 4)
A = (3x - 5)(3x + 3)
A = (3x - 5) * 3(x + 1)
A = 3(3x - 5)(x + 1)
B = 9 - (2 - x)²
B = (3 - 2 + x)(3 + 2 - x)
B = (x + 1)(-x + 5)
C = (x - 1)² - (2 + x)²
C = (x - 1 - 2 - x)(x - 1 + 2 + x)
C = (-3)(2x + 1)
