[X-1]^-17[X-1}+30=0怎么算

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[X-1]^-17[X-1}+30=0怎么算
[X-1]^-17[X-1}+30=0怎么算

[X-1]^-17[X-1}+30=0怎么算
[X-1]^2-17[X-1}+30=0
原方程可化为:
(x-1-15)(x-1-2)=0
即:(x-16)(x-3)=0
x-16=0;x-3=0
所以:x1=16,x2=3 .

令t=x-1
则,t^2-17t+30=0
(t-2)(t-15)=0
t=2或15
x-1=2或15 x=3或16


原方程可化为
(x-1-15)(x-1-2)=0
(x-16)(x-3)=0
x1=16,x2=3