SOLUTION: leave a non-perfect square under the radical sign: 3n^2-2n^2+8=89. how do I solve something like this?

Algebra ->  Square-cubic-other-roots -> SOLUTION: leave a non-perfect square under the radical sign: 3n^2-2n^2+8=89. how do I solve something like this?      Log On


   

Question 550647: leave a non-perfect square under the radical sign: 3n^2-2n^2+8=89. how do I solve something like this?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
3n^2-2n^2+8=89

3n^2-2n^2=89-8

n^2=81

n=+-sqrt(81)

n=9 or n=-9