Разложите на множители 1)17x-34 2)9a^2 x-3x 3)7x^2y^3-21xy^4 4)a^2-6a+9-y^2 5)y^2+2y+1-a^2 6)-7x+2-4x^2

1)17x-34 =17(x-2)
2)9a²x-3x =3x(3a²-1)
3)7x²y³-21xy⁴ =7xy³(x-3y)
4)a²-6a+9-y² = a²-2*3a+3²-y²=(a-3) ²-y²=(a-3-y)(a-3+y)
5)y²+2y+1-a² =(y+1)²-a²=(y+1-a)(y+1+a)
6)-7x+2-4x²=-(7x-2+4x²)= -(4x²-x+x +7x-2)=-(4x²+8x-x -2)= -(4x(x+2)-(x+2))=
-(x+2)(4x-1)