约分:(xy-2y)/(x²-4x+4)
约分:(x²-4)/(xy+2y)
用分式表示2x²y(x-y)÷[12xy²(y-x)]的商,并约分
越快越好(1)(xy²+3)(xy²+3)-2x(-x+y)(2)(x+2)(x²+4)(
已知2x²-3y²=xy,(xy≠0),求值(4xy-x²)/(xy+2y²)的
x²-4y²/x²+2xy+y²÷x+2y/2x²+2xy
12x²+4x-1 x²-(a+b)xy+aby² xy-1+x-y x²-(2
①先化简,再求值.4(3x²y—1/2xy²)—5(—xy²+3x²y),其中x
数学分式通分与约分约分 (x²+xy)/(x+y)² x²-y²/(x²
(xy-2y)÷(x²-4x+4)约分
(2x+3y)²-(x+2y)² X²Y²-4XY^3 +4Y^4
分式的约分与通分问题约分 (x²+xy)/(x+y)² x²-y²/(x&sup
已知(4X-2Y-1)²+根号xy-2=0,求4x²y²+xy²的值