Bonjour,
Factoriser:
A = (6x + 3)(2x - 5) + (3x + 1)(6x + 3)
A = (6x +3)(2x - 5 + (3x + 1))
A = (6x + 3)(2x - 5 + 3x + 1)
A = (6x + 3)(5x - 4)
A = 3(2x + 1)(5x - 4)
B = (4x - 5)(2 - 2x) + (4x - 5)²
B = (4x - 5)(2 - 2x) + (4x - 5)(4x - 5)
B = (4x - 5)(2 - 2x + (4x - 5))
B = (4x - 5)(2 - 2x + 4x - 5)
B = (4x - 5)(2x - 3)
C = (3x + 5)(3 - x) - (3x + 5)(2 + 5x)
C = (3x + 5)(3 - x - (2 + 5x))
C = (3x + 5)(3 - x - 2 - 5x)
C = (3x + 5)(-6x + 1)
D = (3x + 4)² - (3x + 4)(8x + 6)
D = (3x + 4)(3x + 4) - (3x + 4)(8x + 6)
D = (3x + 4)(3x + 4 - (8x + 6))
D = (3x + 4)(3x + 4 - 8x - 6)
D = (3x + 4)(-5x - 2)
E = (4x + 3)(3 - 6x) - (4x + 3)(5 + 4x)
E = (4x + 3)(3 - 6x - (5 + 4x))
E = (4x + 3)(3 - 6x - 5 - 4x)
E = (4x + 3)(-10x - 2)
E = -2(5x + 1)(4x + 3)
Bonne journée.
