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General Surgery

General Surgery deals with surgical treatment of abdominal organs, e.g. intestines inclusive esophagus, stomach, colon, liver and furthermore of the thyroid gland and hernia.

In the last years minimal invasive surgery[?] became more and more important.

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Quadratic formula

... expression to the left of "=", that will make it a perfect square trinomial of the form x2 + 2xy + y2. Since "2xy" in this case is (b/a)x, we must have y = b/(2a), so we ...