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18 March, 15:31

A small painting has an area of 400 cm^2. The length is 4 more than twice the width. Find the dimensions of the pool. Solve by completing the square. Round answers to the nearest tenth.

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  1. 18 March, 18:59
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    A = l*w

    l = 2w + 4

    400 = (2w + 4) * w

    0 = 2w^2 + 4w - 400

    Then use the quadratic equation where a=2, b=4, and c=-400.

    w = 13.2

    l = 30.4
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