怎么解x²+y²=10² (x+9)²+y²=17²
2.(x+y)²(x-y)²-(x-y)(x+y)(x²+y²)
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
已知4x²+y²-4x-6y+10=0,求[(2/3)x√(9x)+y²√(x/y
已知2x-y=10,求代数式[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值?
已知4x²+y²-4x-6y+10=0求(2/3x(√9x)+(y²√x/y³)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
y=-x²-2x+3怎么解
(x-y)³+9(x-y)-6(x-y)²
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x²-y²=10,求[(x+y)³-2y(x+y)²-4(x+y)]÷(x+
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
已知方程组2x-y=10,x+2y=11,求(2x-y)³-(2x-y)²(x-3y)的值