Разложите на множитили 1) 4x^2 y^2-9a^4 2) x^2(1-x)+x(x-1)^2 3) 25a^2-(a+3)^2

1) 4x^2 y^2-9a^4 = (2ху-3а²)(2ху+3а²)
2) x^2(1-x)+x(x-1)^2 = x^2(1-x)+x(1-x)^2 = х(1-x)(х+(1-x)) = х(1-x)(х+1-х) =
= х(1-x)
3) 25a^2-(a+3)^2 = (5а-(а+3))(5а+(а+3)) = (5а-а-3)(5а+а+3) = (4а-3)(6а+3)