Monday

December 22, 2014

December 22, 2014

Posted by **dylan** on Monday, May 6, 2013 at 9:59pm.

- parabolas -
**Reiny**, Monday, May 6, 2013 at 10:33pmThe distance between the vertex and the focus is 3

so the directrix must be x =2 (from -1 to 2 is 3)

let (x,y) be any point on our parabola

√( (x+4)^2 + y^2) = √( (x-2)^2 + 0)

square both sides and expand

x^2 + 8x + 16 + y^2 = x^2 - 4x + 4

y^2 = -12x - 12

**Answer this Question**

**Related Questions**

Alg 2 (ASAP) - I have a parabola vertex (11,3) p is not given, focus pt is not ...

algebra - 6. Find the equation of each parabola described below. a) parabola ...

Algebra 2 - I am creating a project for math in which I have to draw an object ...

Algebra - Can someone tell me if I am right? I need to find the equation of a ...

pre cal - What is the center of the conic whose equation is x^2 + 2y^2 - 6x + ...

algebra problem - I need to find the equation of a parabola. I am not sure if ...

Pre Cal - write the equations of the parabola, the directrix, and the axis of ...

Algebra II - Write an equation for the parabola with focus (1,3) and vertex (0,3...

maths - Given that the equation of the parabola is 5y^2 + 24x = 0. Find (1)The ...

Algebra: Parabolas - I have a math problem that requires me to find the focal ...