2m2 + 19m + 30 = 0

(xxi) 2m² + 19m + 30 = 0

Sol. 2m² + 19m + 30 = 0

∴  2m² + 15m + 4m + 30 = 0

∴  m(2m + 15) + 2(2m + 15) = 0

∴  (2m + 15) (m + 2) = 0

∴  2m + 15 = 0 or m + 2 = 0

∴  2m = –15 or m = –2

∴  m = –15/2  or m = –2