Krishna
0

 Step 1; Apply the deviation on both both sides

                         \frac{dy}{dx} = \frac{dy}{dx} (x^4 - 8x^2 + 3)


Step 2: Differentiate the given equation

                       \frac{dy}{dx} = 4x^3 - 16x

                           4x^3 - 16x = 0

                        

Step 3: Solve the equation of unknown values  

                        [math] 4x[(x^2) - 4] = 0[/math]

                                   x^2 = 4

                                 x = 0, x=\pm2

Step 4: Substitute the x-coordinate in the given equation to calculate the  y-coordinate, vise versa.