determine the maximum or minimum value of each of the following quadratic functions by completing the square. state the value of X corresponding with the maximum or minimum value

1. f(x)= x(square) - 6x + 2

2. f(x)= 3x(square) + 9x + 7

3. f(x)= 1 - 4x - x(square)

answer with solution plz.. "x(square) is x2" the digit 2 is too big