Tricia completed the square of the quadratic function f(x) = x² + 14x + 2 and determined the coordinates of the minimum value are (-7, -47).
Which equation must be Tricia's result?
f(x) = (x + 7)² + 47
f(x) = (x +7)² - 47
f(x) = (x -7)² + 47
f(x) = (x -7)² - 47