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
如果2X-Y=10,求代数式[(X²+Y²)-(X-Y)²+2Y(X-Y)]÷4Y
4/X+1/Y=2,XY=-1,求代数式4Y-X/X-2Y/(x+2y-12Y²/x-2y)的值
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2x-y=10 求代数式[(x∧2+y∧2)-(x-y)∧2+2y(x-y)]÷4y的值
如果2x-y=8,求代数式[(x^2+y^2)-(x-y)^2+2y(x-y)]除以(4y)的值.
若x-y=6,xy=-8,求代数式(x+y+z)²+(x-y-z)(x-y+z)-2·z(x+y)的值
已知x²+y²+5=2x+4y,求代数式(2x²-(x+y)(x-y))x((x+y-1)
已知x-y=2则代数式6-x+y-(y-x)²的值是多少