Mathematics

29 July, 06:39

Which of the following equations demonstrate that the set of polynomials is not closed under the certain operations?

A. Division: (x^2+2x) / (x+1) = x + x/x+1

B. Multip.: (3x^4+x^3) (-2x^4+x^3) = - 6x^6 + x^7+x^6

C. Addition: (3x^4+x^3) + (-2x^4+x^3) = x^4 + 2x^3

D. Multip.: (x^2+2x) (x+1) = x^3 + 3x^2+2x

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