1)3xy(4x-1)
2)2x²(13x-7y+4)
3)a^4(a²-1)-3(a²-1)=(a-1)(a+1)(a^4-3)
4)x²(2x-3y)-2(2x-3y)=(2x-3y)(x²-2)
5)m²(a-b-c)-n(a-b-c)=(a-b-c)(m²-n)
6)(0,2p-1,3q)(0,2p+1,3q)
7)(0,9q^5-20z^6)(0,9q^5+20z^6)
8)(5+ab)(25-5ab+a²b²)
9)5x(x-y)(x+y)
10)(a-3b)+(a-2b)(a+3b)=(a-3b)(1+a+3b)
11)0,6m(4m²-1)-8(9-30m+25m²)=2,4m³-0,6m-7,2+24m-20m²=
=2,4m³-20m²+23,4m-7,2