Hãy tìm x biết ​\((x+3) \cdot(2 x+3)=4 x^{2}-9\)

A.  \(x \in \left\{ { -2;6} \right\}\)

B.  \(x \in \left\{ { - \frac{3}{2};6} \right\}\)

C.  \(x \in \left\{ { - 2;2} \right\}\)

D.  \(x \in \left\{ { - \frac{1}{2};2} \right\}\)