Quadratic Functions · Exercise 31

Use the vertex $\left(h,k\right)$ and a point on the graph $\left(x,y\right)$ to find the general form of the equation of the quadratic function.

$\left(h,k\right)=\left(2,0\right),\left(x,y\right)=\left(4,4\right)$

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Algebra and Trigonometry 2e · §5.1 Quadratic Functions · Exercise 31