Question

Algebra 2 help please!

What is the equation of the quadratic graph with a focus of (2, 0) and a directrix of y = −12?

Answer 1

-1/24 x^2+1/6 x-35/6

x^2 − 4x − 35

1/24 x^2+1/6 x+35/6

−x^2 + 4x + 35

Answer 2

I have it coming out to 1/24(x-2)^2+6

Then change the center (x-2)^2 to (x^2-4+4)

which gives you 1/24 x^2-1/6 x + 1/6 - 6

Answer 3

Which you can then simplify to be 1/24 x^2 - 1/6 x + 35/6

It just doesn't come out, I'm off by one sign.