Question 30
If
$$
\begin{aligned} (7+4\sqrt3)x^2 &+(2+\sqrt3)x\\ &-2=0, \end{aligned}
$$
the larger root minus the smaller root is:
$$
\begin{aligned} (7+4\sqrt3)x^2 &+(2+\sqrt3)x\\ &-2=0, \end{aligned}
$$
the larger root minus the smaller root is: