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14-06-2017
Mathematics

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Quadratic equation by completing the square x^2+6x=18

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konrad509 konrad509

14-06-2017

[tex]x^2+6x=18\\ x^2+6x+9=27\\ (x+3)^2=27\\ x+3=\sqrt{27} \vee x+3=-\sqrt{27}\\ x=-3+3\sqrt 3 \vee x=-3-3\sqrt3[/tex]

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