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Which of the following shows that polynomials are closed under subtraction when polynomial 5x − 6 is subtracted from 3x^2 − 6x + 2?.
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Which of the following shows that polynomials are closed under subtraction when polynomial 5x − 6 is subtracted from 3x^2 − 6x + 2?.

User TreantBG
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The subtraction is shown below,
(3x² - 6x + 2) - (5x - 6)
Distribute the negative to the subtrahend,
(3x² - 6x + 2) - 5x + 6
Combining like terms give us the answer to the question above,
3xx² - 11x + 8.
User Cyberwombat
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