666=666x^2

Solution for 666=666x^2 equation:

666=666x^2

We move all terms to the left:

666-(666x^2)=0

a = -666; b = 0; c = +666;
Δ = b2-4ac
Δ = 02-4·(-666)·666
Δ = 1774224
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1774224}=1332$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-1332}{2*-666}=\frac{-1332}{-1332}
=1
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+1332}{2*-666}=\frac{1332}{-1332}
=-1
$