(x+3y)/﹙x²-y²﹚-(x+2y)/(x²-y²)+﹙2x-3y﹚/﹙x
(x+3y)/﹙x²-y²﹚-(x+2y)/(x²-y²)+﹙2x-3y﹚/﹙x
x(x-y)-y(y-x)+(x-y)²因式分解
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
因式分解x²(x-2y)+y²(2y-x)
计算:(1)2/(x+y)+4y/x²-y²(2)x²/x+y-x+y
计算 x+2y+﹙4y²/x-2y﹚+﹙4x²y/4y²-x²)
[(x+2y)²-﹙x-y﹚﹙x+2y﹚-5y²]÷﹙2y﹚²等于多少
12x²-3y² (2x+y)²-(x+2y)²
已知:(x+2)²+|x+y-10|=0,求3x²y-[5x²y-﹙2xy-x²
若x+y=4,则多项式½(x+y)+4﹙x-y)-3(x-y)-3/2(x+y)-x+y是多少?
{(x-y)²+(x+y)(x-y)}÷2x
﹙x+y﹚﹙x-y﹚-﹙x-y﹚²