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发布时间:2022-04-23 02:44
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2*X^2-4X-3*根号(X^2-2X-4)=10
2(X^2-2X-4)-3√(X^2-2X-4)-2=0,
令,√(X^2-2X-4)=t,(t≥0),
2t^2-3t-2=0,
(2t+1)(t-2)=0,