200÷[100÷X+100÷Y]怎么化简?
(60X-y)÷60+5+y÷100=X这个方程怎么解
(x^2-xy)y÷y-x/xy怎么做?
谁帮我化简:[(x+y)(x-y)-(x+y)^2-2y(x-y)-2xy]÷xy
化简求值 [(x-y^2)+(x+y)(x-y)]÷2x.
化简求值:[(x+y)(x-y)-(x-y)²+2y(x-y)]÷4y,其中x=二分之一,y=2
[(3x+y)²-(3x-y)²]÷(4x-2y)计算 怎么做?
【(2x+y)²-y(y+4x)-8x】÷2x,其中x=100
化简求值:[(3x-1\2y)^2+3y(x-y\12)]÷[(2x+y)^2-4y(x+1\4y)]
化简求值【(x+2Y)的平方-(x+Y)(3x-Y)-5y的平方】÷(2x),其中x=-2,y=2/1
化简求值:(x+y)(x-y)+(x-y)²-(6x²y-2xy²)÷2y,其中x=-2,
化简求值:已知【3x分之2-x+y分之2(3x分之x+y-x-y)】÷5x+3y=0
1.化简求值:(x+y)(x-y)-(x-y)²-6x²y÷2y+(2xy)²÷(-4xy