Can anyone solve for x pls i need help

Using the completing-the-square method, find the vertex of the function f(x) = 2x2 − 8x + 6 and indicate whether it is a minimum or a maximum and at what point. maximum at (2, –2) minimum at (2, –2) maximum at (2, 6) minimum at (2, 6)

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Someone me what is the area of this figure? 18m 18m 8m 16m