Equation of the tangents 
What is the equation of the tangent to $y=x^3-6x^2+12x+2$ that is parallel to the line $y=3x$ ?

I have no idea, how to solve, no example is given in the book! 
Appreciate your help! 

Look at a taylor series (ref 1, 2) of your function about a point $x_c$ of order 1 (linear). 
Then find which $x_c$ produces a line parallel to $3x$, or has a slope of $3$. 
Hint! There are two solutions actually.
