А)
2m(a-b)-3n(b-a) = 2m(a-b)+3n(a-b) = (a-b)(2m+3n)
Б)
18ab³+27a²-45ab⁴ = 9a(2b³+3a-5b⁴)
В)
a(x-y)+b(x-y)-c(y-x) = a(x-y)+b(x-y)+c(x-y) = (x-y)(a+b+c)
Г)
m(a-1)-2n+2an = m(a-1)+(2an-2n) = m(a-1)+2n(a-1) = (a-1)(m+2n)
Д)
32 ac²+15cx²-10c³-48ax² = (32 ac²-48ax²)-(10c³-15cx²) =
= 16a(2c²-3x²)-5c(2c²-3x²) = (2c²-3x²)(16a-5c)