Question 1080736
Use the caret for exponentiation "^".
Use the minus sign "-" for subtraction.
x^2-3x-17=0
{{{x^2-3x-17=0}}}
Complete the square,
{{{x^2-3x+(3/2)^2-17=(3/2)^2}}}
{{{(x-3/2)^2=9/4+68/4}}}
{{{(x-3/2)^2=73/4}}}
{{{x-3/2=0 +- sqrt(73)/2}}}
{{{x=3/2 +- sqrt(73)/2}}}