Помогите решить, очень надо!!!
a) 2xy-3ay+2x^2-3ax
y(2x-3a)+x(2x-3a)
(2x-3a)*(y+x)
б) a^2b^2+2a^2b+2ab-ab^2
ab(2b+2a+2-b)
в) (x-y)^2+3(y-x)
(x-y)^2+3*(-(-x-y))
(x-y)^2-(x-y)
(x-y)*(x-y-3)
а)4ab-bc+4a^2-ac
b(4a-c)+a(4a-c)
(4a-c)(b+a)
б)x^2y-xy^2-xy+x^2
x(xy-y^2-y+x)
x(y(x-y)-y+x)
x(x-y)(x+1)
в)(a-2)^2-5(2-a)
(a-2)^2-5(-(a-2))
(a-2)^2+5(a-2)
(a-2)(a-2+5)
(a-2)(a+3)
