(x²-xy+1/4y²)/(2x-y)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
3x²y+xy²-[2xy²-4x²y+(x²y-2xy²)
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知2x+y=0,求x-2y/x²+xy*(x²-y²)/x²-4xy+4y
|x+2|+(y-1/4)²=0,求2(x²y+xy)-3(x²y-xy)-4x²
谢谢(关于因式分解)2x²+xy-y²-4x+5y-6x²-2x-14(x-y+1)+y(
(1).设A=2X²-3Xy+y²+X-3y,B=4X²-6xy+2y²+4X-
(-4X²Y)(-X²Y²)÷1\2XY 的三次方
分式计算:(x²+2xy+y²)/(x²y+xy)*y/(x+y)
去括号:1/2(2X²Y-3XY²+4XY-X²Y²)=?
(-2/3X³y+4x²y²-1/2xy²)/(-xy/4) 急