Posted by carmen on .
completing the square
2m^2m15=0
using the quadratic formula
2y^23y6=0

math 
Reiny,
2m^2  m = 15
m^2 (1/2)m = 15/2
m^2  (1/2)m + 1/16 = 15/2 + 1/16
(m  1/4)^2 = 121/16
m  1/4= ± 11/4
m = 1/4 ± 11/4
m = 3 or m = 5/2
the second one is simply subbing into the formula and numbercrunching.
let me know what you got.