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Dactylorhiza

The genus Dactylorhiza is a small genus of terrestrial, or ground orchids from Europe and can be fround from the far north to the far south.

One of the most widespread and common species is the "Common Spotted Orchid" below:



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Quadratic formula

... 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 add the square of b/(2a) to both ...

 
 
 
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