Решите 3y(6y+2)-4(3y+1)>0

Question

Решите
3y(6y+2)-4(3y+1)>0

Answer 1

[Решение в приложении]

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Answer 2

3y(6y+2)-4(3y+1)>0
18y²+6y-12y-4>0
18y²-6y-4>0
9y²-3y-2>0
D=9+72=81
y1=(3-9)/18=-1/3
y2=(3+9)/18=2/3
  +                  _                      +
-------(-1/3)------------(2/3)-------------
y∈(-∞;-1/3) U (2/3;∞)