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11 September, 18:17

If its length is 2x-3 feet and its width is 5x+1 feet, what is the actual length and width of the rectangle? (a rectangle has an area of 1281 square feet.)

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  1. 11 September, 21:36
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    (2x - 3) X (5x + 1) = 1281

    *it's a quadratic

    10x² - 13x - 3 = 1281 * move 1281 to the left side to equal zero

    10x² - 13x - 1284 = 0

    and solve to look for the zeros ...

    Do you know how to?
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