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OpenStudy (anonymous):
Solve x^2 + 6x + 7 = 0.
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myininaya (myininaya):
\[x^2+6x=-7 \] \[x^2+6x+9=-7+9\] \[(x+3)^2=2\] \[x+3=\pm \sqrt{2}\] \[x=-3 \pm \sqrt{2}\]
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