If $f(x) = 2 x^2 + 5 x + 3$, find $f'( 3 )$, using the definition of derivative. $f'( 3 )$ is the limit as $x\to$ of the expression

The value of this limit is
Use this to find the equation of the tangent line to the parabola $y = 2 x^2 + 5 x + 3$ at the point $( 3 , 36 )$. The equation of this tangent line can be written in the form
$y =$