作业帮化简求值：[(3x-1\2y)^2+3y(x-y\12)]÷[(2x+y)^2-4y(x+1\4y)]
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/25 15:24:56
![化简求值：[(3x-1\2y)^2+3y(x-y\12)]÷[(2x+y)^2-4y(x+1\4y)]](/uploads/image/z/1248903-63-3.jpg?t=%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC%EF%BC%9A%5B%283x-1%5C2y%29%5E2%2B3y%28x-y%5C12%29%5D%C3%B7%5B%282x%2By%29%5E2-4y%28x%2B1%5C4y%29%5D)
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化简求值：[(3x-1\2y)^2+3y(x-y\12)]÷[(2x+y)^2-4y(x+1\4y)]
化简求值：[(3x-1\2y)^2+3y(x-y\12)]÷[(2x+y)^2-4y(x+1\4y)]
化简求值：[(3x-1\2y)^2+3y(x-y\12)]÷[(2x+y)^2-4y(x+1\4y)]
原式=(9x^2-3xy+1/4y^2+3xy-1/4y^2)÷(4x^2+4xy+u^2-4xy-y^2)
=9x^2÷4x^2
=9/4