Which operation shows that polynomials are a closed system under addition? (1 point)

Question

(5x ^ 2 + 2x + 1) + (- 2x ^ 2 + 6x + 4) =(5x^ 2 -2x^ 2 )+(2x+6x)+(1\

(5x ^ 2 + 2x + 1) + (- 2x ^ 2 + 6x + 4) = (- 2x ^ 2 + 2x + 4) + (5x ^ 2 + 6x)

(5x ^ 2 + 2x + 1) + (- 2x ^ 2 + 6x + 4) = 3x ^ 2 + 8x + 5

(-2x²+6x+4)=-3x² + 8x - 3 (5x² + 2x + 1) + (-2x²+6x+4) -3x²+8x

Answer 1

The operation that shows that polynomials are a closed system under addition is:

(5x^2 + 2x + 1) + (-2x^2 + 6x + 4) = 3x^2 + 8x + 5