Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar(s).
a parabola is given by the equation y=x2 + 4x + 4
the vertex of the parabola is (blank)the focus of the parabola is(blank)
the directrix of the parabola is given by the equation y=(blank)
note: separate coordinates inside parentheses with a comma.