用公式法解方程：5x^2+2x-1=0 y^2+2=2倍根号2y （2x-1）（x-2)=-1用公式法解5x^2+2x-1=0y^2+2=2倍根号2y（2x-1）（x-2)=-1

用公式法解方程：5x^2+2x-1=0 y^2+2=2倍根号2y （2x-1）（x-2)=-1用公式法解5x^2+2x-1=0y^2+2=2倍根号2y（2x-1）（x-2)=-1
用公式法解方程：5x^2+2x-1=0 y^2+2=2倍根号2y （2x-1）（x-2)=-1
用公式法解5x^2+2x-1=0
y^2+2=2倍根号2y
（2x-1）（x-2)=-1

用公式法解方程：5x^2+2x-1=0 y^2+2=2倍根号2y （2x-1）（x-2)=-1用公式法解5x^2+2x-1=0y^2+2=2倍根号2y（2x-1）（x-2)=-1
第二题二倍根号二Y还是二倍根号2y,就是说那个Y在哪个位置

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