Bonjour,
Factoriser:
B= 6x²(9x⁵+7x³+13)
C= 6x²y³(7x³-3x²y-5y⁴)
D= 15x³y³(3xy⁴z²-2yz+1)
E= (3-2x)(5-x-7+4x)= (3-2x)(3x-2)= -(2x-3)(3x-2)
F= (x+4)(7-4x-7-3x)= (x+4)(-7x)= -7x(x+4)
G= (5+2x)(5-x-1)= (2x+5)(-x+4)= -(2x+5)(x-4)
H= (7-9x)(1+x-3)= (-9x+7)(x-2)= -(9x-7)(x-2)
I= (x+2)(x+2+3)= (x+2)(x+5)
