Here's the question you clicked on:
iop360
isolate equation for x: ( find the inverse equation!)
\[y = \frac{ 1 }{ 4 }x^3 + 12x -9\]
Wolframalpha is giving me insanity: http://www.wolframalpha.com/input/?i=solve+for+x%2C+y+%3D+%5Cfrac%7B+1+%7D%7B+4+%7Dx%5E3+%2B+12x+-9
it cannot be that complicated... lol
i have it now something like: \[4y + 36 = x^3 + 48x\]