Respostas

2013-10-25T15:59:14-02:00
B^2-4ac = 9

raizes= -b+/-raiz de 3/2  

x1=-7+3/2=-2
x2=-7-3/2=-5
2013-10-26T11:21:40-02:00
Hola.

x² = 7x + 10
x² - 7x - 10 = 0

x = [ 7 ± √[(-7)² -4*(-10)]]/2*1
x = [7 ± √[49+40)]/2
x = (7 ± √89)/2
x' = (7 + √89)/2 e
x'' = (7 - √89)/2