Question

5n^2 + 1205 -3660 = 0

solve this quadratic eqn
spliiting the middle term

Answer 1

$5n^2 + 1205 -3660 = 0|:5\\n^2+241-732=0\\n^2=491\\n_1=\sqrt{491}\\ n_2=-\sqrt{491}$

I think you misspelled it and it should be $5n^2 + 1205n -3660 = 0\\n^2+241n-732=0\\D=241^2-4*(-732)=61009=247^2\\n_1=\frac{-241+247}{2} =3\\n_2=\frac{-241-247}{2} =-244$