1)а^3-2а^2-2а+4=a²(a-2)-2(a-2)=(a-2)(a²-2)
2)-у^6-у^5+у^4+у^3=-y^5*(y+1)+y³(y+1)=(y+1)(-y^5+y³)=y³(1-y²)(y+1)=
=y³(1-y)(1+y)(y+1)=y³(1-y)(1+y)²
3)х^2+2х-15=(x²-3x)+(5x-15)=x(x-3)+5(x-3)=(x-3)(x+5)
4)16ав^2-10с^3+32ас^2-5в^2с=16a(b²+2c²)-5c(b²+2c²)=(b²+2c²)(16a-5c)
7)3х^2+4х-7=(3x+7)(x-1)
8)2у^2-7у-9=(2x-9)(x+1)