1/3x-2 – 1/3x+2 – 3x-6/4-9x^2

0 bình luận về “1/3x-2 – 1/3x+2 – 3x-6/4-9x^2”

1. =1/3x-2 – 1/3x+2 + 3x-6/9x^2-4

   =1.(3x+2)/(3x-2)(3x+2) – 1.(3x-2)/(3x-2)(3x+2) + 3x-6/(3x-2)(3x+2)
   =3x+2-3x+2+3x-6 / (3x-2)(3x+2)
   =3x-2 / (3x-2)(3x+2)
   =1/3x+2

   Bình luận