Respostas

2014-06-01T15:16:39-03:00
(m² - 9)x² + (3-m)x +4=0
m²x² - 9x² +3x -mx + 4=0
x(m²x -9x) + x(3 -m) +4=0
x + x + 4=0
2x+4=0
2x=- 4
x= -4
      2
x= - 2

m²x-9x=0
m². (-2) -9 . (-2)=0
- 2m² + 18=0
- 2m² = -18 . (-1)
 2m² = 18
 m²= 18
         2
m²= 9
m = √9
m = 3

3 -m=0
3 - 3 =0