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7 August, 02:19

The volume of a rectangular prism is represented by the function x3 + 9x2 + 6x - 16. The length of the box is x + 2 while the height is x + 8. Find the expression representing the width of the box.

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  1. 7 August, 05:27
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    The volume of the box is length * width * height

    x^3 + 9x^2 + 6x - 16 = (x + 2) * width * (x + 8) = (x^2 + 10x + 16) * width

    using synthetic division

    -2 1 9 6 - 16

    -2 - 14 16

    -8 1 7 - 8 0

    -8 8

    1 - 1 0

    Therefore, x^3 + 9x^2 + 6x - 16 = (x + 2) (x + 8) (x - 1)

    Therefore, the width of the prism is x - 1
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