Factoriser les expressions suivantes : A= (3 x - 1)(x - 8) + (2 x +4) (x – 8)
B = (x - 5) (x + 2) - (x – 5) (3 x + 1)
C = 7 x2 – 21 x
D= 5 x? + 15 x
E = 4 x2 + x
F = (x + 2) (x + 5) - 3 (x + 5)
G= x (2 x + 3) – 7 (2 x+3)
H=2 x + 3 + 5 x (2 x + 3)
I= 2 x + 1 + 5 x (2 x + 1) – 3 x (2 x + 1)
J= (2 x – 5)2 - (2 x - 5) (x + 2)
K = (x-8)+ x -8
B = (x - 5) (x + 2) - (x – 5) (3 x + 1)
C = 7 x2 – 21 x
D= 5 x? + 15 x
E = 4 x2 + x
F = (x + 2) (x + 5) - 3 (x + 5)
G= x (2 x + 3) – 7 (2 x+3)
H=2 x + 3 + 5 x (2 x + 3)
I= 2 x + 1 + 5 x (2 x + 1) – 3 x (2 x + 1)
J= (2 x – 5)2 - (2 x - 5) (x + 2)
K = (x-8)+ x -8
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