Je dois factoriser ses 3 expressions :
A=(x+4)² -(6-x)(x+4)
B=(x+5)(2x-3)-(6x-9)
C=(3x-1)(x-2)-3(2-x)
A=(x+4)² -(6-x)(x+4)
B=(x+5)(2x-3)-(6x-9)
C=(3x-1)(x-2)-3(2-x)
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a =(x+4)(x+4-6+x)
a =(x+4)(2x-2)
a = 2(x+4)(x-1)
B=(x+5)(2x-3)-(6x-9)
b =(x+5)(2x-3) -3(2x-3)
b =(2x-3)(x+5-3)
b =(2x-3)(x+2)
C=(3x-1)(x-2)-3(2-x)
c =(3x-1)(x-2) +3(-2+x)
c =(3x-1)(x-2)+3(x-2)
c =(x-2)(3x-1+3)
c =(x-2)(3x+2)