If h(x)=43x3\displaystyle {h}{\left({x}\right)}={4}-{3}{x}^{{3}}, find h(2)\displaystyle {h}'{\left({2}\right)}.  

Use this to find the equation of the tangent line to the curve y=43x3\displaystyle {y}={4}-{3}{x}^{{3}} at the point (2,20)\displaystyle {\left({2},-{20}\right)}. The equation of this tangent line can be written in the form y=mx+b\displaystyle {y}={m}{x}+{b} where m\displaystyle {m} is:  

and where b\displaystyle {b} is: