Bonsoir,
Factoriser en utilisant un facteur commun:
A = 14 - 21x
A = 7*2 - 7*3x
A = 7(-3x + 2)
B = 5x² + 7x
B = x*5x + x*7
B = x(5x + 7)
C = 3x² + 15xy
C = 3x*x + 3x*5y
C = 3x(x + 5y)
D= 49y² + 7xy + 28z
D = 7*7y² + 7*xy + 7*4z
D = 7(7y² + xy + 4z)
E = (2x + 1)*2 + (2x + 1)*x
E = (2x + 1)(x + 2)
F = (1 - 3x)(2 + x) + (1 - 3x)(5 - 2x)
F = (1 - 3x)(2 + x + (5 - 2x))
F = (1 - 3x)(2 + x + 5 - 2x)
F = (1 - 3x)(-x + 7)
F = (3x - 1)(x - 7)
G = (2 + 3x)(x + 1) - 5(x + 1)(x + 2)
G = (2 + 3x)(x + 1) - 5(x + 2)(x + 1)
G = (x + 1)(2 + 3x - (5x + 10))
G = (x + 1)(2 + 3x - 5x - 10)
G = (x + 1)(-2x - 8)
C = -2(x + 4)(x + 1)
H = (2 + 3x)(x - 1) - (x + 1)(3x + 2)
H = (3x + 2)(x - 1) - (x + 1)(3x + 2)
H = (3x + 2)(x - 1 - (x + 1))
H = (3x + 2)(x - 1 - x - 1)
H = -2(3x + 2)
* = multiplication
Bonne soirée.
