помогите решить уравнение,плес
^ - степень

81х^5 - x^3 = 0

81x^5 - x^3 = 0
x^3(81x^2 - 1) = 0
x^3(9x - 1)(9x + 1) = 0
x^3 = 0
x = 0
9x - 1 = 0
9x = 1
x = 1/9
9x + 1 = 0
9x = - 1
x = - 1/9
Ответ:x1 = 0, x2 = 1/9, x3 = - 1,9.