Х^3-2^3= (Х-2)(х^2+2х+4)
Х^2 -3^2=(Х-3)(Х+3)
Х^3+8=х^3+2^3=
(Х+2)(х^2-2х+4)
Х^2-9= х^2-3^2=
(Х^2 -3)(х^2+3)
27-х^3=3^3 -х^3=
(3-Х)(9+3х+х^2)
64+х^6=(2^2)^3+(х^2)^3=(4+х^2)(16-4х^2+х^4
(3а-7)^2 - (4а-5)^2=
((3а-7)-(4а-5))((3а-7)+(4а-5))=
(3а-7-4а+5)(3а-7+4а-5)=
(-а-2)(7а-12)=
-(а+2)(7а-12)