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2014-09-09T19:20:16+03:00
- x^{2} +10x+2=0 /-1
 x^{2} -10x-2=0
Δ=100+8=108
 x_{1} = \frac{-10+ \sqrt{108} }{2}
 x_{2} = \frac{-10- \sqrt{108} }{2}

S={ \frac{-10- \sqrt{108} }{2} ; \frac{-10+ \sqrt{108} }{2} }