Question 326438
{{{x^2-20x=50}}}
Take (1/2) of the x-coefficient, square it, add it to both sides.
{{{(-20/2)^2=100}}}
{{{x^2-20x+100=50+100}}}
{{{(x-10)^2=150}}}
Take the square root of both sides.
{{{x-10=0 +- sqrt(150)}}}
{{{highlight(x=10 +- 5sqrt(6))}}}