已知x/y=4/3,求3x²-5xy+2y²/2x²+3xy-5y²的值
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![已知x/y=4/3,求3x²-5xy+2y²/2x²+3xy-5y²的值](/uploads/image/z/264120-24-0.jpg?t=%E5%B7%B2%E7%9F%A5x%2Fy%3D4%2F3%2C%E6%B1%823x%26%23178%3B-5xy%2B2y%26%23178%3B%2F2x%26%23178%3B%2B3xy-5y%26%23178%3B%E7%9A%84%E5%80%BC)
已知x/y=4/3,求3x²-5xy+2y²/2x²+3xy-5y²的值
已知x/y=4/3,求3x²-5xy+2y²/2x²+3xy-5y²的值
已知x/y=4/3,求3x²-5xy+2y²/2x²+3xy-5y²的值
x/y=4/3,
设比的每一份为t,
则x=4t,y=3t
所以
(3x²-5xy+2y²)/(2x²+3xy-5y²)
=(48t²-60t²+18t²)/(32t²+36t²-45t²)
=6t²/(23t²)
=6/23