Question 309226
9x^2-18x+81=0
9(x^2-2x+9)=0
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
x=(2+-sqrt[-2^2-4*1+9])/2*1
x=(2+-sqrt[4-36])/2
x=(2+-sqrt-32)/2
x=(2+--5.657i)/2
x=2/2+-5.657i/2
x=1+-2.828i ans.