Question 872249
{{{x^2+20=39}}}
{{{x^2=19}}}
{{{x=0 +- sqrt(19)}}}
or
{{{x^2+20x=39}}}
{{{x^2+20x+100)=39+100}}}
{{{(x+10)^2=139}}}
{{{x+10=0 +- sqrt(139)}}}
{{{x=-10 +- sqrt(139)}}}