1. anonymous

Is your question right?? Because it is not factorisable...

2. anonymous

well thats what it said but i hered i might have to use quuadratic formula

3. anonymous

Yeah I am thinking the same.. $a = \frac{5 \pm \sqrt{25 + 80}}{2} \implies a = \frac{5 \pm \sqrt{105}}{2} = ??$ This is not factorisable I think..