2 years ago

Which of the following is a solution of x^2 2x = −2?

1 answer:

dem82 [27]2 years ago

3 0

$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
$

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