Question

Domain and range of 8x(2x+9)(x+7)

Answer 1

Suppose you expand 8x(2x+9)(x+7).
Of what degree is the polynomial you get?

Answer 2

3rddegree

Answer 3

3rd degree

Answer 4

Every 3rd degree function has the same end behaviour, which means:
If you put in larger and larger (positive) numbers, f(x) is getting larger and larger as well.
If you put in smaller and smaller (negative) numbers, f(x) is getting smaller and smaller as well.
Or: the other way round, see image.


What do you think this means for domain and range?