What is polynomials?​

Explanation:

Polynomials are sums of terms of the form k⋅xⁿ, where k is any number and n is a positive integer

Polynomials are composed of some or all of the following:

Variables - these are letters like x, y, and b

Constants - these are numbers like 3, 5, 11.  

Exponents - exponents are usually attached to variables but can also be found with a constant.  

Addition, subtraction, multiplication, and division - For example, you can have 2x (multiplication), 2x+5 (multiplication and addition), and x-7 (subtraction.)

Explanation:

chordata is the answer