Respostas

2014-05-26T15:57:36-03:00
9x²+9x+2=0

Basta resolver por Bhaskara.

x= (-9+-√9²-4*9*2) 2(9)

x =(-9+-√9)18
x= (-9+-3)18
x1= -12/18 = -2/3
x2= -6/18 = -1/3

2014-05-26T15:58:22-03:00
 
Δ=  9^{2} -4.9.2
Δ= 81-72
Δ=9
 \sqrt{9} =3
x=-9+3/2.9= -6/18
x=-9-3/2.9= -12/18