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(2006•曲靖)用换元法解方程+2x=x2-3时,如果设y=x2-2x,则原方...
(2006•曲靖)用换元法解方程
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+2x=x
2-3时,如果设y=x
2-2x,则原方程可化为关于y的一元二次方程的一般形式是
.
考点分析:
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