Please help me with just part b part a
create a Third-degree polynomial in standard form how do you know it is in standard form?
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.part b
explain the closure property as it relates to addition of polynomials give an example

answer for part a tell me if it makes sense

3x^3 + 6x^2 + 5x - 9
I know this is a third-degree polynomial in standard form because the highest degree identifies the degree of polynomial (3x^3) is the highest degree it’s also written in descending order of exponents with standardize form to write a polynomial

PLEASE HELP ME WITH PART B
explain the closure property as it relates to addition of polynomials give an example?