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23 July, 18:39

Which of the following represents the simplified form of the expression below? (x3 + 4x2 + 12x - 13) - (-2x3 - x2 + 3x + 1)

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  1. 23 July, 19:42
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    3x3 + 5x2 + 9x - 14

    Step-by-step explanation:

    (x3 + 4x2 + 12x - 13) - (-2x3 - x2 + 3x + 1)

    = (x3 + 4x2 + 12x - 13) + (2x3 + x2 - 3x - 1) distribute the - 1

    = (x3 + 2x3) + (4x2 + x2) + (12x - 3x) + (-13 - 1) rearrange the terms

    = 3x3 + 5x2 + 9x - 14 combine like terms
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