x^2=1665

Solution for x^2=1665 equation:

x^2=1665

We move all terms to the left:

x^2-(1665)=0

a = 1; b = 0; c = -1665;
Δ = b2-4ac
Δ = 02-4·1·(-1665)
Δ = 6660
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{6660}=\sqrt{36*185}=\sqrt{36}*\sqrt{185}=6\sqrt{185}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-6\sqrt{185}}{2*1}=\frac{0-6\sqrt{185}}{2}
=-\frac{6\sqrt{185}}{2}
=-3\sqrt{185}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+6\sqrt{185}}{2*1}=\frac{0+6\sqrt{185}}{2}
=\frac{6\sqrt{185}}{2}
=3\sqrt{185}
$