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28 May, 16:41

the area of a rectangle can be expressed by 2x^2-7x-4 if the rectangle has an area of 45 find the positive value for x

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  1. 28 May, 18:58
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    x^2 + 8x + 15 is the area

    x+5 is the length

    x+3 is the width

    (x+5) (x+3) =

    x^2 + 3x + 5x + 15

    x^2 + 8x + 15
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