Respostas

2014-06-04T19:04:37-03:00
X²=3x+10
x²-3x-10=0
Δ= (-3)²-4.1.(-10)
Δ=9+40
Δ=49

x=(-(-3)+-√49)/2.1
x=3+-7/2
x1=10/2 = 5
x2= -4/2 = -2