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20 December, 09:55

Chantel is carpeting a room that has an area of x^2-100 square feet. If the width of the room is x-10 feet, what is the length of the room.

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  1. 20 December, 10:09
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    A=LW and we are told that:

    A=x^2-100 and W=x-10 so:

    x^2-100=L (x-10)

    L = (x^2-100) / (x-10) factoring the numerator ...

    L = ((x+10) (x-10)) / (x-10) the (x-10) terms cancel out leaving ...

    L=x+10
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