Which of the following equations demonstrate the set of polynomials is not closed under the certain operation? A. Addition: (x2 + x) + (x + 1) = x2 + 2x+1
B. Multiplication: (x2 - 5x+3)(x - 5) - W - 10x2 +28x-15
C. Division: (x - 5x+3) - (x - 2) = x-3+ ---
D. Subtraction: (3x* + **)-(-2x*+x") = 5x*

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