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OpenStudy (anonymous):
√x+7+5=x
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OpenStudy (anonymous):
\[\sqrt{x+7+5}=x\]
OpenStudy (anonymous):
x=-3 and x=4
OpenStudy (anonymous):
\[\sqrt{\cos 4x/\cos x}\]
OpenStudy (nikvist):
x=4 only
OpenStudy (anonymous):
no way nikvist it will form a quadratic equation
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