Question

find the focus and directrix of the parabola with the equation 4x^2 + 10y = 0

Answer 1

where is "the parabola"?

Answer 2

i have to graph the parabola but to do so i need the focus

Answer 3

http://hotmath.com/hotmath_help/topics/finding-the-equation-of-a-parabola-given-focus-and-directrix.html

Answer 4

b a d thing the answer is a

Answer 5

are you good at *completing the square* method ??

Answer 6

no

Answer 7

well yes but i don't know how i would use it with this specific problem

Answer 8

first we have to rewrite the equation in vertex form \[\large\rm y=a(x-h)^2+k\]
where (h,k) is the center
the line (axis of symmetry) splits the parabola in half . any point( which is equal distance away from vertex) on this line would represent the focus of this parabola