5n^2-720=0

Solution for 5n^2-720=0 equation:

5n^2-720=0

a = 5; b = 0; c = -720;
Δ = b2-4ac
Δ = 02-4·5·(-720)
Δ = 14400
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{14400}=120$
$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-120}{2*5}=\frac{-120}{10}
=-12
$
$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+120}{2*5}=\frac{120}{10}
=12
$