Question 934659
{{{20w^2+100w+40=20(w^2+5w+2)=20(w+(5+sqrt(17))/2)(w+(5-sqrt(17))/2)}}}
It is not pretty, because the solutions to {{{w^2+5w+2=0}}} are
{{{w=(-5 +- sqrt(17))/2}}} .
If the solutions had been nice whole numbers,
you would have seen the factoring.
Probably you should go to sleep now, and so do I.