2) 3x^2+ 6xy + 3y^2=3*(x+y)^2;
3) 6a^2- 6b^2=6*(a^2-b^2)=6*(a-b)*(a+b)
4) 4x^2- 4y^2=4*(x^2-y^2)=4*(x-y)(x+y)
5)12a-12b=12(a-b)
6) 8x+ 8y=8(x-y)
НОК (2*(a-b)^2;6*(a-b)*(a+b);12(a-b))=2*3*2*(a-b)^2*(a+b)=
=12(a-b)*(a+b)^2
НОК(3*(x+y)^2;4*(x-y)(x+y);8*(x-y))=3*4*2(x+y)^2*(x-y)=
=24(x-y)*(x+y)^2