Hi

I have been attempting this question, but i do no know how to continue...

Determine the minimal distance from the point (0,4) to the curve y = 8 - x^2

I know the distance formula is $\displaystyle D = \sqrt{(x_2-x_1)^2 + (y_2 - y_1)^2} $

after plugging in the x1 and y1 i got $\displaystyle D = \sqrt{x^2 + (y-4)^2} $

What do i do next? Am i doing a step wrong?

Thanks