![if \: x = {3}^ \frac{2}{3} + {3}^ \frac{1}{3} \: prove \: that \: {x}^3 = 12 + 9x if \: x = {3}^ \frac{2}{3} + {3}^ \frac{1}{3} \: prove \: that \: {x}^3 = 12 + 9x](https://tex.z-dn.net/?f=if+%5C%3A+x+%3D++%7B3%7D%5E+%5Cfrac%7B2%7D%7B3%7D++%2B++%7B3%7D%5E+%5Cfrac%7B1%7D%7B3%7D++%5C%3A+prove+%5C%3A+that+%5C%3A++%7Bx%7D%5E3+%3D+12+%2B+9x)
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