knutsonellie8332 knutsonellie8332 22-11-2017 Mathematics contestada Which operation is NOT closed for polynomials? A) −(x2 + 4x + 5)(8x2 + 3x + 4) B) (7x2 + 2x + 3) + (3x2 − 5x + 4) C) (x2 + 2x + 5) − (x2 − 2x + 9) D) (x3 + 4x − 5)/(x5 − 2x + 2)