Exercice 4: Factoriser
K-(2x-1)(3x+4) + 7x (3x+4)
M-(x-5X(6x+7)+(6x
0-(7x+4)²+(4x-5) (7x+4)
+ 7) (3x+4)
L=9(8x-3)-(2x + 5)(8x-3)
N=(9x-1)(2x + 3)-(9x-1)(7x-2)
P=(x - 5)(4-8x)-(4-8r)²