Not enough information- the coupon will only be worth 24% after tax though.
You could say 84/2, 126/3, or even 168/4
You do
-26
-4
---
-30
5n=-30 so...
-30/5=-6
Therefore
n=-6
You will have to take 3x common from both terms and your ans should look like this,
3x(9x^2-4)
