Question

resolvendo x(3x+4)= -1 vamos obter

Answer 1

3x²+4x=-1

3x²+4x+1=0

A=3
B=4
C=1

∆=b²-4.a.c
∆=4²-4.3.1
∆=16- 12
∆=4

x=-b±√∆/2a

x=-4±√4/2.3

x=-4±2/6

x'=-4+2/6= -2/6 = -1/3

x"=-4-2/6= -6/6 = -1


S= {-1/3, -1}