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解方程时,如果设y=x2-x,那么原方程可变形为关于y的整式方程是A.y2-2y-1=0B...
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解方程
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RK5CYII=
)
时,如果设y=x
2-x,那么原方程可变形为关于y的整式方程是( )
A.y
2-2y-1=0
B.y
2-2y+1=0
C.y
2+2y+1=0
D.y
2+2y-1=0
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