Respuesta :
Answer: A, C, D
Step-by-step explanation:
Because I just took the test.
When addition, subtraction and multiplication is performed on two polynomials, this always results in a polynomial.
What is a polynomial?
Polynomial is an expression that involves only the operations of addition, subtraction, multiplication of variables.
Polynomials can be classified based on degree as linear, quadratic and cubic.
When addition, subtraction and multiplication is performed on two polynomials, this always results in a polynomial.
Find out more on polynomial at: https://brainly.com/question/2833285