What is the missing area of the square?

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)

For the equations below which statement is true ? -2x=14 6x=-42

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?