Bonjour
A=(x-2)^2-36
A=(x-2-6)(x-2+6)
A=(x-8)(x+4)
B=1+(2x+3)^2
B=(1-2x-3)(1+2x+3)
B=(-2-2x)(4+2x)
C=(3x-2)^2-(x+3)^2
C=(3x-2-x-3)(3x-2+x+3)
C=(2x-5)(4x+1)
D=(x+5)^2-(2x-4)^2
D=(x+5-2x+4)(x+5+2x-4)
D=(-x+9)(3x+1)
Voilà
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Bonjour
A=(x-2)^2-36
A=(x-2-6)(x-2+6)
A=(x-8)(x+4)
B=1+(2x+3)^2
B=(1-2x-3)(1+2x+3)
B=(-2-2x)(4+2x)
C=(3x-2)^2-(x+3)^2
C=(3x-2-x-3)(3x-2+x+3)
C=(2x-5)(4x+1)
D=(x+5)^2-(2x-4)^2
D=(x+5-2x+4)(x+5+2x-4)
D=(-x+9)(3x+1)
Voilà