Question 211353
2x^2-9x-1=o
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
X=(9+-SQRT[-9^2-4*2*-1])/2*2
X=(9+-SQRT[81+8])/4
X=(9+-SQRT89)/4
X=(9+-9.43398)/4
X=(9+9.43398)/4
X=18.43398/4
X=4.6085 ANS.
X=(9-9.43398)/4
X=-.43398/4
X=-1.085 ANS.