разложите на множители c-6c^3-6c^2x+x
2)3d^2-30dx+75x^2 3)(5a-5c) в квадрате минус 81c^2 4)48-3d^2

1) c-6c^3-6c^2x+x = =c(1-6c^2)+x(1-6c^2) ==(1-6c^2)(c+x) 2)3d^2-30dx+75x^2 = 3(d^2 - 10dx + 5^2x^2) = 3(d - 5x)^23) (5a-5c)^2 -  81c^2 = (5a-5c)^2 - 9^2c^2 = (5a - 5c - 9c)(5a - 5c+ 9c) =   =  (5a - 14c) (5a+4c)4) 48-3d^2 =  3(4^2 - d^2) = 3(4-d)(4+d)