I do not know which code I must use

I have a equation. For example f(x) = x^2 - 9*x + 10 . I want these following equations (f(x) = 0):

x = (9*x - 10)^(1/2) x = - (9*x - 10)^(1/2) x = -10/(x-9) x = (x^2 + 10)/9