Respostas

2013-11-26T19:11:09-02:00
X² = 3x + 10
x² - 3x - 10 = 0

form. baskara =  x = -b +-Vb² - 4ac/2a

a= 1
b= -3
c= -10
x= -( -3) +- V-3² - 4 . 1 . -10/ 2 . 1
x = 3 +- V 9 + 40 /2
x = 3 + -V 49/2
x= 3+- 7/2
x' = 3 +7  /2 = 10/2 = 5
x" = 3 - 7 / 2 = - 4/2 = - 2
1 5 1