How many distinct factors are there for the expresion (x2 - 2) (x2 + 4x + 4)?

Answer it with a reason plss

In the image, layer a is the topmost layer. layer c contains fossils from the precambrian era. layer b contains dinosaur fossils, and layer a contains fossils of mammals. which two statements are supported by this evidence? 1. mammals lived before the precambrian era. 2. dinosaurs and mammals existed in the precambrian era. 3. dinosaurs evolved after precambrian organisms. 4. precambrian organisms evolved after dinosaurs. 5. precambrian organisms were the first life-forms to become fossilized, according to this sample.

Auser wants to add a thick, dark green border around a chart in powerpoint. the user can do this in chart tools by choosing what

What did pavlov initially notice about the animals in his original research after conditioning took place?