-х^2-10х-25>0 /:(-1)
х^2+10х+25>0
Д=B^2-4ac=100-100=0 (один корень)
х1= -10/2 = -5
х2+10х+25=(х+5)^2
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-х^2-10х-25>0 /:(-1)
х^2+10х+25>0
Д=B^2-4ac=100-100=0 (один корень)
х1= -10/2 = -5
х2+10х+25=(х+5)^2