SOLUTION: Write the vertex form for a parabola with the given characteristics. 1. vertex ( 0, 0) directrix x = -15 2. vertex (3, 3) focus (3, 0) 3. Vertex ( 0, 0 ) focus ( 2, 0)

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: Write the vertex form for a parabola with the given characteristics. 1. vertex ( 0, 0) directrix x = -15 2. vertex (3, 3) focus (3, 0) 3. Vertex ( 0, 0 ) focus ( 2, 0)       Log On


   



Question 851812: Write the vertex form for a parabola with the given characteristics.
1. vertex ( 0, 0) directrix x = -15
2. vertex (3, 3) focus (3, 0)
3. Vertex ( 0, 0 ) focus ( 2, 0)
Write the standard form for the parabola given the following equation.
4. x^2 + 8x - y + 20 = 0

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 
Hi,
sketch IT (Directrix x = 15 the clue) Parabola opening left a < 0
the vertex form of a Parabola opening right(a>0) or left(a<0), x=a%28y-k%29%5E2+%2Bh
where(h,k) is the vertex and y = k is the Line of Symmetry
x=a%28y%29%5E2+ V(0,0) Finding value of a
p(distance of the directrix and focus left 0r right of vertex) = 15, a = 1/4p = -1/60 as a < 0
x=%28-1%2F60%29%28y%29%5E2+