Level:
Project ID:
2010011505
Source Problem:
Accepted:
0
Clonable:
1
Easy:
0
Assuming \(x\in \mathbb{R}\),
find the solution set of the following inequality.
\[
(x+3)^2-1+3x^2 >(2-2x)^2
\]
\(\left( -\frac27;\infty\right)\)
\(\left( \frac27;\infty\right)\)
\(\left( -\infty;\frac27 \right)\)
\(\left( -\infty;-\frac27\right)\)