【(2x+y)²-y(y+4x)-8x】除以2x,其中x=2
「(x²+y²)-(x-y)²+2y(x-y)」÷4y,其中2x-y=18
分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2
先化简,再求值:(3x-y)²-2x(4x-5y)-(x+2y)²,其中x=2009,y=-2
[(x+2y)²-(x+y)(3x-y)-5y²]÷(2x),其中x,y满足x²+4x+y
2x-y=2,求[(x²+y²)-(x-y)²+2y(x-y)]÷4y
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
(x+y)²-2(x²-y²)+(y-x)²
设P(x,y)是圆x²+y²+8y+12=0上的一点,√(x²+y²-2x-2y
已知2x-y=10 【(x²+y²)-(x-y)²+2y(x-y)】÷4y 过程
2x-y=10 【(x²+y²)-(x-y)²+2y(x-y)】÷4y
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
化简求值:[(x+y)(x-y)-(x-y)²+2y(x-y)]÷4y,其中x=二分之一,y=2