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Mathematics, 26.03.2020 00:57 cuscuecer16

Which operation is NOT closed for polynomials?
(x2 + 2x - 5)
(x + 3x + 1)
(x2 + 2x - 5)(4x2 + 3x - 6)
(x2 + 2x - 5) + (x2 – 5x + 1)
(2x2 + 2x - 5) - (x2 + 6x + 2)
the answer is A

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Which operation is NOT closed for polynomials?
(x2 + 2x - 5)
(x + 3x + 1)
(x2 + 2x...
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