Question 330333
Square both sides.
{{{x^2=4(x+3)}}}
{{{x^2-4x-12=0}}}
{{{x^2-4x+4-16=0}}}
{{{(x-2)^2=16}}}
{{{x-2=0 +- 4}}}
{{{x=2+-4}}}
{{{x1=6}}} and {{{x2=-2}}}