解方程(x²-x)²-5(x²-x)+6=0
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解方程(x²-x)²-5(x²-x)+6=0
解方程(x²-x)²-5(x²-x)+6=0
解方程(x²-x)²-5(x²-x)+6=0
(x²-x-3)(x²-x-2)=0
(x²-x-3)(x-2)(x+1)=0
∴x²-x-3=0 x-2=0 x+1=0
∴x=(1+√7)/2 x=(1-√7)/2 x=2 x=-1
X=2/-1
X2-X-3=0 自己算