Charlie subtracts two polynomials, 2x²-2x², and says that the difference proves that polynomials are not closed under subtraction. Kate argues that the difference does in fact show that polynomials are closed under subtraction. Who is correct?

Question

(1 point)

O Charlie

Kate

Answer 1

Kate is correct. The difference of 2x² and 2x² is 0, which is still a polynomial. This shows that polynomials are closed under subtraction.