Respostas

2014-05-22T21:27:00-03:00
2x² + 7x + 3 = 0
Δ = 49 - 24 = 25
x = -7 +- 5
         4
x¹ = -7 -5 = -12 = -3
         4        4
x² = -7 +5 = -2 = -1
         4        4     2
2014-05-22T21:27:34-03:00

2x²+7x+3=0
 ∆ = b² - 4ac = 7² - 4*2*3 = 25
 
x = (-b+ - √∆)/2 a

x= (-7 + - 5) / 2*2
x1 = - ½  ou x2 = - 3 
1 5 1