求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.
求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.
如果2x-y=10,求代数式[(x²+y²)-(x-y)²+2y(x-y)]÷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,求代数式[x²+y²-(x-y)²+2y(x-y)]÷4y的值
4/X+1/Y=2,XY=-1,求代数式4Y-X/X-2Y/(x+2y-12Y²/x-2y)的值
[(y-2x)(-2x-y)-4(x-2y)²]*2y,其中x=1,y=2
已知x² +y²+5/4=2x+y,求y-x的值
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y的值
已知:X²+2Y²+4X-12Y+22=0,其中X、Y都为有理数,求Y的X次方的值
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013