y÷(12-x)= 10,y÷(12+x)= 6
先化简,再求值:{(x+2y)(x-2y)+4(x-y)²}÷6x,其中x=12,y=3.
先化简再求值[(x+y)2-(x+y)(x+3y)-4y2]÷2y,其中x=-2,y=12
化简求值:[(x+2y)2-(x+y)(3x-y)-5y2]÷2x,其中x=-2,y=12
已知y-2x=10,求[2y(x-y)-(x-y)2+(x+y)2-2xy]÷4y的值.
已知2x-y=10,求代数式[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值?
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
已知x²-y²=10,求[(x+y)³-2y(x+y)²-4(x+y)]÷(x+
先化简,再求值 (1)[(x-y)的平方+(x+y)(x-y)]÷2x 其中X=2010,y=2009 (2)y(x+y
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013
先化简,再求值:(x+2y)2-2(x-y)(x+y)+2y(x-3y),其中x=-2,y=12
已知实数x,y满足|x|+x+y=10、x+|y|-y=12,则x+y的值?