Respostas

2013-10-27T00:57:38-02:00
X² - 7x + 10 = 0
a = 1
b  = -7
c = 10

x = -  ( -7 ) +- V  -7 ² - 4 . 1 . 10/ 2 . 1
x = 7 +- V 49 - 40 / 2
x= 7 +- V9/2
x' = 7 + 3 / 2 = 10/2 = 5
x" = 7 - 3 / 2 = 4/2 = 2

raizes  5,2
2 3 2