x-3-5x-6-0-x-

Question Number 175739 by cortano1 last updated on 06/Sep/22

x^{3} - 5 x - 6 = 0

x = ?

Commented by mr W last updated on 06/Sep/22

c o r t a n o s h o u l d k n o w c a r d a n o :

x = \sqrt[3]{\frac{\sqrt{354}}{9} + 3} - \sqrt[3]{\frac{\sqrt{354}}{9} - 3}

Commented by cortano1 last updated on 06/Sep/22

hahaha

i gotx = \sqrt[3]{3 + \sqrt{\frac{118}{27}}} + \sqrt[3]{3 - \sqrt{\frac{118}{27}}}