-6(x-y)³+18(y-x)²-24(Y-x)³
x(x-y)-y(y-x)+(x-y)²因式分解
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
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
x²+y²-4x+6y+13=0,求(3x+y)²-3(3x+y)(x+y)-(x-3y)
3(x-y)²·[-四分之十五(y-x)³][-三分之二(x-y)^4]
(x-y)³(y-x)(y-x)²+(x-y)^6
已知(x+y)²与|½y-1|互为相反数,求x³y²的值
y=5;x=14;y=((x=3*y,x+6),x-1); printf(''x=%d,y=%d'
12x²-3y² (2x+y)²-(x+2y)²
因式分解 X^4(X-y)-y^4(X-y)
七年级数学题(x-y)³ ×(x-y)²×(y-x)