Pls i need help rn this is due REALLY soon pls thank you

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)

The area of square garden is 300m squared. how long is the diagonal?

2.5 milligrams is equivalent to how many grams