`3x-3y+x^2-y^2` `x^3+3x+2` `3xy^2-6x^2y`

1 bình luận về “`3x-3y+x^2-y^2` `x^3+3x+2` `3xy^2-6x^2y`”

1. 3x-3y+x^2-y^2

   =3(x-y)+(x-y)(x+y)

   =(x-y)(3+x+y)

   ____________________

   x^2+3x+2

   =x^2+2x+x+2

   =x(x+2)+(x+2)

   =(x+2)(x+1)

   __________________

   3xy^2-6x^2y

   =3xy(y-2x) 

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