Which equation is the inverse of y = x^2 – 36?

Side note: Yo, you seem like a cool dude. Could you post another answer on this; for me please. I spent 30 minutes answering it but I cannot get brainliest answer unless there is another person.

Now to answer the question: 
I'm assuming by inverse you mean when x is the subject, not y.
y = x^2 - 36
y + 36 = x^2
squareroot(y+36) = x

Ithink the answer is d.