Question 808955
40n^3 - 25n^2 + 56n - 35 = 0
looks like you can group factor here
5n^2(8n - 5) + 7(8n - 5) = 0
Factor out (8n-5)
(8n-5)(5n^2+7) = 0
one real solution
8n = 5
n = 5/8
and two non-real
5x^2 = -7
x^2 = -7/5
x = +/-{{{i*sqrt(7/5)}}}