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Factors of 5 are only 1 and 5, which cannot lead to 2x, so using the quadratic formula (-2 +/- sqrt(4 - 20))/2 = (-2 +/- 4i))/2 = -1 +/- 2i which takes us into the realm of imaginary numbers...

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Q: X2 plus 2x plus 5 equals 0?
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