Math

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How do find the inverse function for this problem:

f(x) = -(x+3)^2, x is greater or less than 3

I know the first thing you do is switch the variables, so it looks like this:
x = -(y+3)^2
Then expand:
x = -y^2-6y-9
And solve for y:
x + 9 = -y^2-6y

I get a little confused after that with y. Help please? Thank you very much!

  • Math -

    oh, i also meant that x is greater than or equal to 3. sorry.

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