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求X的方程(X-3)(X-3)-6(X-3)(X-3)+9=0
人气:341 ℃ 时间:2020-05-26 03:18:35
解答
(X-3)^2 -6(X-3)^2 =-9
=>-5(X-3)^2=-9
=>(X-3)^2=9/5
=>X-3 =±√(9/5)=±(3√5)/5
=> X=3±(3√5)/5
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