1) 25x - x^3 = x(25 - x^2) = x(5 + x)(5 - x)
2) x^3 - 6x^2 + 9x = x(x^2 - 6x + 9) = x(x - 3)(x - 3) = x(x - 3)^2
1) 25x - x^3 = x(25 - x^2) = x(5 + x)(5 - x)
2) x^3 - 6x^2 + 9x = x(x^2 - 6x + 9) = x(x - 3)(x - 3) = x(x - 3)^2