已知2a+3b=0,求分式3a²-5ab+2b²/2a²+3ab-5b²的值
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已知2a+3b=0,求分式3a²-5ab+2b²/2a²+3ab-5b²的值
已知2a+3b=0,求分式3a²-5ab+2b²/2a²+3ab-5b²的值
已知2a+3b=0,求分式3a²-5ab+2b²/2a²+3ab-5b²的值