约分:x²+xy/(x+y)²请解析一下为什么是x/(x+y)
数学分式通分与约分约分 (x²+xy)/(x+y)² x²-y²/(x²
分式的约分与通分问题约分 (x²+xy)/(x+y)² x²-y²/(x&sup
约分:(x²-4)/(xy+2y)
用分式表示2x²y(x-y)÷[12xy²(y-x)]的商,并约分
分解因式 x²(x²-y²)+z²(y²-x²) (a+b)
1-x²+2xy-y²
3x²-4xy+y²
xy²/(x²y-y) × x²/(x²+x)=
xy²/(x²y) - y×x²/(x²+x)=
已知x²y²+x²+y²=10xy-16 求x,y
x²-4y²/x²+2xy+y²÷x+2y/2x²+2xy
3y/2x+2y+2xy/x²+xy 2x/x²-64y²-1/x-8y (1/a+1/b