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18 June, 16:24

The rectangle below has an area of 49-x^2 square meters and a width of 7+x. What expression represents the length of the rectangle?

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  1. 18 June, 16:48
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    49-x^2 factors to (7+x) (7-x). This is because both terms are perfect squares.

    When you divide out 7+x because a rectangle's area equals length times width, you get 7-x

    Final answer: 7-x
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