Respostas

2013-09-14T23:47:52-03:00
 y=x²-4x+3

a = 1
b = -4
c = 3

b² - 4ac

-4² - 4 . 1 . 3

16 - 12



-b +- 
 \sqrt{4}  / 2a

4 + 2 / 2 . 1
6 / 2 
3

4 - 2 / 2 . 1
2 / 2
1

Raízes : { 3,1}


7 4 7