What is the algebraic expression .three more then the sum of a number and four ?

Which of the following equations is of the parabola whose vertex is at (4, 3), axis of symmetry parallel to the y-axis and focus at (4, -3)? a.) y+3=1/24 (x+4)^2 b.)y-3=-1/24 (x-4)^2 c.)x-4=-1/24 (y-3)^2

Need on this geometry question. explain how you did it.

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36