X+2)(3X-1)+x²-4
(x+2)(3x-1) +(x-2)(x+2)
(x+2)(3x-1+x-2)
(x+2)(4x-3)
(X-3)(x+1)-(x²-9)
(x-3)(x+1) -(x-3)(x+3)
(x-3)(x+1-x-3)
(x-3)(-2)
-2(x-3)
X²-4
(x-2)(x+2)
x²-9
(x-3)(x+3)
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Lista de comentários
X+2)(3X-1)+x²-4
(x+2)(3x-1) +(x-2)(x+2)
(x+2)(3x-1+x-2)
(x+2)(4x-3)
(X-3)(x+1)-(x²-9)
(x-3)(x+1) -(x-3)(x+3)
(x-3)(x+1-x-3)
(x-3)(-2)
-2(x-3)
X²-4
(x-2)(x+2)
x²-9
(x-3)(x+3)
(x+2)(3x-1) ( x-2)(x+2)
(x +2) (3x-1 x -2)
(x+2)(4x -3)
(x-3)(x+1)-(x-3)(x+3)
(x-3) (x+1 -x-3)
(x-3)( -2)
x² -4
(x-2)(x+2)
x² -9 = (x-3)(x+3)