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OpenStudy (anonymous):
Factor 2x^2-4x-1 =0 (2x+/-?)(x+/-?)
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OpenStudy (anonymous):
\[2 x^2-4 x-1 \]cannot be factored. If set to zero and solved for x, \[x=\frac{1}{2} \left(2\pm \sqrt{6}\right) \]
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