DestinyKiara99 DestinyKiara99

21-11-2015
Mathematics

contestada

Which of the following is a solution of x^2 2x = −2?
x = 4 − 3i
x = −4 3i
x = −1 i
x = 1 − i

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konrad509 konrad509

21-11-2015

[tex]x^2+2x=-2\\ x^2+2x+1=-1\\ (x+1)^2=-1\\ x+1=\sqrt{-1}\vee x+1=-\sqrt{1}\\ x=-1+i \vee x=-1-i [/tex]

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