What is the equation of the tangent line to y = x^2 at x = 4?

If d/dx (f(4x2)) = 9x2. Calculate f'(x) = It is given to you that an equation of the tangent line to the graph of y = g (x) at x = 4 is 7x+ 12 y= -92 It follows that y = is the equation of the tangent line to y = g(x2) at x = 2 and that y = is the equation of the tangent line to y = (g(x))2 at x = 4. Find h'(- 2) if h = f o g, f(x ) = 3x2 - 5 and the equation of the tangent line of g at - 2 is y = - 5x + 8.