Responding to the environment by maintaining a stable internal environment despite changing external conditions is

Responding to the environment by maintaining a stable internal environment despite changing external conditions is characteristic of living things. The maintain of stable internal environment called homeostasis. Other characteristics of living things are: the possibility to produce, one or more cells, the possibility to grow and develop...

2. x2 + 8x + 12 = 0 to prove: x = -6 or x = -2