Question

Resolva a inequação 2x2-12x<0.

Answer 1

2x²+12x+18 = 0
a=2
b=12
c=18
Δ = √b²-4ac
Δ = √(12)²-4(2)(18)
Δ = √144-144
Δ = √0 -  nao existe

x = (-b+/-√Δ)/2a
x = (-12+/-0)/2x2
x = -12/4
x = -3