Which operation is NOT closed for polynomials? A) (x2 - 3x + 5) + (5x2 - 8x + 4) B) (4x3 - 2x + 6) - (x2 + 3x + 2) C) (x2 - 3x + 5) (x3 - 4x + 4) D) (x2 + 3x + 5) (x3 + 4x + 2)

Question

Mathematics

Abbigail Parsons

16 September, 12:55

Which operation is NOT closed for polynomials? A) (x2 - 3x + 5) + (5x2 - 8x + 4) B) (4x3 - 2x + 6) - (x2 + 3x + 2) C) (x2 - 3x + 5) (x3 - 4x + 4) D) (x2 + 3x + 5) (x3 + 4x + 2)

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Digger · Answer 1

Just remember what functions are open and closed. Addition and multiplication are closed. Subtraction and division are both open. In this case B is the only one that uses an open operation.