Question 302412
{{{4X^2-9X-5=0}}}

Using the formular : {{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}

where a = 4 , b = -9 and c = -5 

{{{x = (9 +- sqrt( (-9)^2-4*4*(-5) ))/(2*4) }}}

Answer : x = 2.71107 or -0.46107