Question

Find the equation for the inverse of each equation:
f(x)=x^2-4

Answer 1

I have this as an answer X+4=F^-1(X)

Answer 2

Write y=x²-4, let x and y switch position:
x=y²-4 and solve for y...

Answer 3

Your answer is wrong I'm afraid...
If x=y²-4 then y²=x+4, so y=...?

Answer 4

I have this so far \[\sqrt{X+4} = \sqrt{Y^2}\]

Answer 5

Yes, so\[y=\sqrt{x+4}\]or better:\[f^{-1}(x)=\sqrt{x+4}\]

Answer 6

So then that would be the answer after i i have squared both sides right? \[F^-1 =\sqrt{X+4}\]

Answer 7

See my last answer above...
BTW, you really should avoid using the capitals...

Answer 8

They don't even fit under the radicals ;)

Answer 9

Thanks:D & okay i will^-^

Answer 10

YW!