A. [1.4, 1.5]

**Answer 1**

What is: f(x) = 2x − x3 + 3?

if x3 is x cubed, that is written x^3 or x³

Is the 2x actually 2x⁴? Usually the higher power comes first.

Clarify and we’ll be glad to help.

**Answer 2**

f(x) is a polynomial function

if f(a)f(b)<0 and a < b then the root in (a , b)