Question 1711
Sure, I'll show you. It's the same person who answered it last time.
2x^2=11x-9     Given
2x^2-11x+9=0   Invert,lety=0
{{{formula}}}  QF
{{{x=(11+-sqrt(121-72))/(2*2)}}}  Sub
{{{x=(11+-sqrt(49))/(4)}}}      S
{{{x=(11+-7)/(4)}}}      S
And after you do the adding and subtracting, it will leave you with this:
9/2 and 1