# Math Help - help with inverse

1. ## help with inverse

I need help with this inverse problem...Im no good in math.

f(x)=(x+2)^3-4

2. Originally Posted by bastropgarl
I need help with this inverse problem...Im no good in math.

f(x)=(x+2)^3-4
$y = (x+2)^3 - 4$

The key is to isolate x in terms of y.

$x = \sqrt[3]{y+4} - 2$

Then replace $x$ with $f^{-1}(x)$ and $y$ with $x$

$f^{-1}(x) = \sqrt[3]{x+4} - 2$