8ab³-12a²b²-24a²b²=
=8ab³-36a²b²=
4ab²(2b-9a)
(a-b)² +2(a²-b²) + (a+b)²=
=a² – 2ab +b² +2a²-2b² +a² +2ab +b²=
=4a²
a-b+a²-b²=
=(a-b)+(a²-b²)=
=(a-b)+(a-b)(a+b)=
=(a-b)(1+a+b)=
(a+b)(a+b+1)
8ab³-12a²b²-24a²b²=
=8ab³-36a²b²=
4ab²(2b-9a)
(a-b)² +2(a²-b²) + (a+b)²=
=a² – 2ab +b² +2a²-2b² +a² +2ab +b²=
=4a²
a-b+a²-b²=
=(a-b)+(a²-b²)=
=(a-b)+(a-b)(a+b)=
=(a-b)(1+a+b)=
(a+b)(a+b+1)