SOLUTION: Nine more than the cube of a number is the same as 81 times the number. Find the numbers.

Algebra ->  Problems-with-consecutive-odd-even-integers -> SOLUTION: Nine more than the cube of a number is the same as 81 times the number. Find the numbers.      Log On


   

Question 1054473: Nine more than the cube of a number is the same as 81 times the number. Find the numbers.
Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.
Nine more than the cube of a number is the same as 81 times the number. Find the numbers.
~~~~~~~~~~~~~~~~~~~~ 

x%5E3+-+81x+%2B9 = 0.



Plot y = x%5E3+-+81x+%2B9

There is no real rational roots.

The real root/roots is/are irrational.