Respostas

2013-10-08T11:33:24-03:00
 3x²+5x+2=0
ax²+bx+c=0
a = 3, b = 5 e c = 2
delta = b² - 4.a.c
delta = 5² - 4.3.2
delta = 25 -24
delta = 1

x = - b +ou- raiz² de delta / 2.a
x = - 5 +ou- raiz² 1 / 2.3
x = - 5 +ou- 1 / 6
x1 = - 5 + 1 / 6
x1 = - 4 / 6 = - 2/3

x2 = - 5 - 1 / 6
x2 = - 6 / 6 = - 1

x1 = - 2/3 e x2 = - 1