x²+2/2x²-1减3(2x²-1)/x²+2x²+2/2x²-1减3(2x²-1)/x²+2=-2
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x²+2/2x²-1减3(2x²-1)/x²+2x²+2/2x²-1减3(2x²-1)/x²+2=-2x²+2
x²+2/2x²-1减3(2x²-1)/x²+2x²+2/2x²-1减3(2x²-1)/x²+2=-2
x²+2/2x²-1减3(2x²-1)/x²+2
x²+2/2x²-1减3(2x²-1)/x²+2=-2
x²+2/2x²-1减3(2x²-1)/x²+2x²+2/2x²-1减3(2x²-1)/x²+2=-2
(3-√2)/3
ggg