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11 April, 06:27

Perform the indicated operation. (7x4 + 11x3 - x2 - 8x + 6) - (-12x4 + 9x2 - 15) A) - 5x4 + 11x3 + 8x2 - 8x - 9 B) 19x4 + 11x3 - 10x2 - 8x + 21 C) 5x4 + 2x3 + 14x2 - 8x + 6 D) - 19x4 - 2x3 - 8x2 - x + 9

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  1. 11 April, 07:02
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    The answer to your question is: Letter B

    Explanation:

    (7x⁴ + 11x³ - x² - 8x + 6) - (-12x⁴ + 9x² - 15)

    7x⁴ + 11x³ - x² - 8x + 6 + 12x⁴ - 9x² + 15

    19x⁴ + 11x³ - 10x² - 8x + 21
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