Mathematics, 11.03.2021 20:10 christopherholmes

Which of the following equations demonstrate that the set of polynomials is not closed under the certain operations?
A. Addition: (3 x4 + x°) + (-2x4 + x) = x4 + 2x
B. Multiplication: (x2 + 2x)(x + 1) = x + 3x2 + 2x
C. Multiplication: (3x4 + x®)(-2x4 + x) = -6x8 + x + x
D. Division: (2x2 + 2x) = (x + 1) = x + 1

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