Question 238146
(x^2 - 11x + 4) - (-2x^2 + 2x - 6) - (x^2 + 6x - 5)
X^2-11X+4+2X^2-2X+6-X^2-6X+5
2X^2-19X+15
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
X=(19+-SQRT[-19^2-4*2*15])/2*2
X=(19+-SQRT[361-120])/4
X=(19+-SQRT241)/4
X=(19+-15.524)/4
X=(19+15.524)/4
X=34.524/4
X=8.631 ANS.
X=(19-15.524)/4
X=3.476/4
X=.869 ANS.