Автор - mozgpavel
3.
а)3xy-12y²=3y(x-4y)
б)a³-ya=a(a²-y)
4.6x³y*(-2y³x)= -12y⁴x⁴
5.(x+5)(3x-2)(x²-4x-10)=(3x²-2x+15x-10)(x²-4x-10)=(3x²+13x-10)*(x²-4x-10)=3x⁴-12x³-30x²+13x³-52x²-130x-10x²+40x+100=3x⁴+x³-92x²-90x+100
6.точка (1;-1)