How would I go about solving this?
$\displaystyle 6x^2+17x-39=0$
EDIT: Factorised into $\displaystyle (-13+-3x)(3+-2x)=0$But that didn't help
(3 - 2x) = 0 , or (-13 - 3x) = 0.
therefore
$\displaystyle x=1.5$ or $\displaystyle x=\frac{-13}{3}$
It has to be one definite answer though. It tells me from this I should be able to calculate a side in a polygon (I need to find x). Do I try subbing both into the formula and see which works?