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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