Find the equation of the tangent line(s),which is perpendicular to the line x+6y+5=0, to the graph of F(x) at the tangent point(s) (x,y)

Hint:Find the slope first then use y-y=m(x-x)

The equation is $\displaystyle f(x)= 2x^3-3 $

i dont really get this equation anyone know were to start