Bonjour
(x+1)(x+1)-(2-x)(2-x)
(X+1)^2 - (2-x)^2
(X+1-2+x)(x+1+2-x)
(2x-1)(3)
3(2x-1)
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Bonjour
(x+1)(x+1)-(2-x)(2-x)
(X+1)^2 - (2-x)^2
(X+1-2+x)(x+1+2-x)
(2x-1)(3)
3(2x-1)