Mica is solving for the zeros of a quadratic function by
completing the square. Her work is shown. What error
did Mica make?

O Mica should have set each x=0 instead of f(x).
O Mica should have added 2 to 3 instead of 1.
O Mica should have multiplied both sides by 2 instead
of dividing.
O Mica should have subtracted 1 from both sides
instead of adding.