Respostas

2014-03-28T17:26:23-03:00
(m-3 ). 2+4. (m-5)
(m-3). 6. (m-5)
(6m- 18) (m-5)
6m^2 - 30m -18m + 90
6m^2 - 48m +90

▲ = 48^2 - 4 . 6. 90
▲= 144

x'= 48 + 12 / 2.6
x'= 60/12 = 5

x''= 48-12 / 2.6
x''= 36/12 = 3

m=5 =3