Question 910386
{{{ x^2-2x-3= sqrt( 4 ) }}}
x^2-2x-3 = ± 2
Either
x^2 - 2x = 5  Completing Square
x^2 - 2x + 1 = 5 + 1
(x-1)^2 = 6 , x = 1 ± √6
0r
x^2 - 2x = 1   Completing Square
x^2 - 2x + 1 = 1 + 1
(x-1)^2 = 2,  x = 1 ± √2