已知x²-y²=10,求[(x+y)³-2y(x+y)²-4(x+y)]÷(x+
已知x²-y²=10,求[(x+y)³-2y(x+y)²-4(x+y)]÷(x+
已知2x-y=10,求代数式[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值?
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
已知2x-y=10,求代数式[x²+y²-(x-y)²+2y(x-y)]÷4y的值
已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y
已知2x-y=10,求式子[(x^2+y^2)-(x-y)^2+2y(x-y)]/4y (4xy-2y²)/4
已知方程组2x-y=10,x+2y=11,求(2x-y)³-(2x-y)²(x-3y)的值
已知4x²+y²-4x-6y+10=0求(2/3x(√9x)+(y²√x/y³)
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知x²+y²+5=2x+4y,求代数式(2x²-(x+y)(x-y))x((x+y-1)
已知{(x²+y²)-(x-y)²+2y(x-y)}÷4y=1,求4x²-y