Question 693363
Given:{{{8n^3 + 10n^2 + 3n = 0}}}
Since the highet power of n is 3; there are 3 answers.

You can start by factoring out an n on the left side
{{{n * (8n^2 + 10n + 3) = 0}}}
In order for the equation to equal zero, the n on the out side must equal zero.
Then you can use the quadratic equation on the part of the equation inside the parentheses. 

*[invoke quadratic "n", 8, 10, 3]

So the values for n are: -0.5, -0.75 and 0