Question

Which is a possible number of real roots for a cubic function? Select all that apply.

0
1
2
3
4

what even is this,

Answer 1

The possible numbers of real roots for a cubic function are 1 and 3. This is because they can be the roots of cubic function because most of the odd numbers are roots for cubic function.

Answer 2

A cubic equation has degree 3. That means that the highest exponent of x (or whatever variable is being used) is 3. This means the function can have 0, 1, 2 or 3 roots.

Whatever the highest exponent of the variable is tells us the highest number of roots it can have. It can have that many or fewer but no less than 0.