Needed to solve :
2x* - 3x - 4 = 0
Any help would be greatly appreciated.
Roots of a quadratic equation $\displaystyle ax^2+bx+c=0$ are
$\displaystyle \frac {-b-\sqrt{b^2-4ac}} {2a}$ and $\displaystyle \frac {-b+\sqrt{b^2-4ac}} {2a}$, using these you get two roots.
For the given equation the roots are 2.35078 and -0.85078 (the have rounded the roots)
$\displaystyle \therefore$ the factore are $\displaystyle (x-2.35078)\miultiply(x+0.85078)=0$