Ответ:
- \(7a^2-7=7(a^2-1)=7(a-1)(a+1)\).
- \(3b^3-3b=3b(b^2-1)=3b(b-1)(b+1)\).
- \(2x^3-2xy^2=2x(x^2-y^2)=2x(x-y)(x+y)\).
- \(-8a^5+8a^3-2a=-2a(4a^4-4a^2+1)=-2a(2a^2-1)^2\).
- \(x-4y+x^2-16y^2=(x-4y)+(x-4y)(x+4y)=(x-4y)(x+4y+1)\).
- \(ab^6-ab^4-b^6+b^4=ab^4(b^2-1)-b^4(b^2-1)=b^4(b^2-1)(a-1)=b^4(a-1)(b-1)(b+1)\).
