30w^2+19w-63
- 19 +/- sqrt( 19^2- 4*30*(- 63))
w = ------------------------------------------
2*30
- 19 +/- sqrt 7921 - 19+/- 89
w = --------------------------- = -------------------
60 60
w =( - 19 +89)/60 = 70/60 = 7/6 and
w = ( - 19 - 89)/60 = - 108/60 = - 9/5