如果2X-Y=10,求代数式[(X²+Y²)-(X-Y)²+2Y(X-Y)]÷4Y
如果2x-y=10,求代数式[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值
如果2X-Y=10,求代数式[(X²+Y²)-(X-Y)²+2Y(X-Y)]÷4Y
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
已知x²+y²+5=2x+4y,求代数式(2x²-(x+y)(x-y))x((x+y-1)
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x+3y=2,求代数式(x²-y²/x+y)-【2(x+y)】的值
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
实数x,y满足|2分之5x-y|+y²-10y+25=0,求代数式1-x-2y分之x-y÷x平方-y平方分之x
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)