Question

Directrix: Y=9
Focal Point: (7,6)
Create an equation for a parabola.

Answer 1

@Hero

Answer 2

The work should look like this

Answer 3

I can upload another example if needed

Answer 4

Seems easy enough. What prevents you from being able to do it yourself?

Answer 5

I am not good at foiling, or solving for a variable

Answer 6

Show the steps up to the point where you get stuck. Then I'll help.

Answer 7

In the picture, where it says y2^2+6y2+9 in red, I dont know how they are getting the numbers. If I knew where the numbers came from, I could solve it.

Answer 8

It comes from squaring \((y_2 + 3)^2\).

Answer 9

ok, but where does the 6y2 and the 9 come in

Answer 10

oh i see, i think i got it now!!!!

Answer 11

\(\begin{align*}(y_2 + 3)^2 &= (y_2 + 3)(y_2 + 3)\\&=y_2(y_2 + 3) + 3(y_2 + 3) \\&= y_2^2 + 3y_2 + 3y_2 + 9 \\&=y_2^2 + 6y_2 + 9\end{align*}\)

Answer 12

ok, thank you so much! I believe I got it know!

Answer 13

Okay, good.