Решите неравенство \((x+3)^2(x^2+x+1)\leq (x^2+4x)(x+3)^2\).
\(\left(\dfrac 1 3;+\infty\right)\)
\(\{-3\}\cup \left[\dfrac 1 3;+\infty\right)\)
\(\{-3\}\)
\(\left[\dfrac 1 3;+\infty\right)\)