Bonjour,
Explications étape par étape :
A = 3x² + 2x + (3x + 2)²
A = x(3x + 2) + (3x + 2)²
A = (3x + 2)(x + 3x + 2)
A = (3x + 2)(4x + 2)
B = (4x + 3)² - 4x - 3
B = (4x + 3)² + (- 4x - 3)
B = (4x + 3)² - (4x + 3)
B = (4x + 3)(4x + 3 - 1)
B = (4x + 3)(4x + 2)
C = (x - 5)(2x + 3) - x² + 25
C = (x - 5)(2x + 3) - (x² - 5²)
C = (x - 5)(2x + 3) - (x - 5)(x + 5)
C = (x - 5)(2x + 3 - x - 5)
C = (x - 5)(x - 2)
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Bonjour,
Explications étape par étape :
A = 3x² + 2x + (3x + 2)²
A = x(3x + 2) + (3x + 2)²
A = (3x + 2)(x + 3x + 2)
A = (3x + 2)(4x + 2)
B = (4x + 3)² - 4x - 3
B = (4x + 3)² + (- 4x - 3)
B = (4x + 3)² - (4x + 3)
B = (4x + 3)(4x + 3 - 1)
B = (4x + 3)(4x + 2)
C = (x - 5)(2x + 3) - x² + 25
C = (x - 5)(2x + 3) - (x² - 5²)
C = (x - 5)(2x + 3) - (x - 5)(x + 5)
C = (x - 5)(2x + 3 - x - 5)
C = (x - 5)(x - 2)