LukeNuno
LukeNuno
03-12-2014
Mathematics
contestada
Solve for x:
x2 + 8x = -1
Respuesta :
konrad509
konrad509
03-12-2014
[tex]x^2+8x=-1\\ x^2+8x+16-16=-1\\ (x+4)^2=15\\ x+4=\sqrt{15} \vee x+4=-\sqrt{15}\\ x=-4+\sqrt{15} \vee x=-4-\sqrt{15}[/tex]
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