Question

X^2(x+7) \< 0

Com resolução detalhada.
\< = menor igual

Answer 1

                         __________-7________________0_______
|      x²     |         ++++++++++|++++++++++++++++|++++++++
|    x + 7  |        - - - - - - - - - - |++++++++++++++++|++++++++
|x²(x + 7) |        - - - - - - - - - -|++++++++++++++++|+++++++++
 V = { x ∈ R / x ≤ -7}