<PRE><B>Question 891721</B>
You could try factoring or just go to the general solution of a quadratic equation.


{{{-6x^2+4x+9=0}}}
same as
{{{6x^2-4x-9=0}}}


Discriminant, 16+4*6*9=232=2*116=2*2*58=2*2*2*29


{{{x=(4+- sqrt(2*2*2*29))/(2*6)}}}----just simplify this.</PRE>