求大神解答(x-y)^3(a-b)^2/(b-a)(y-x)
速度解答 (y-x)(a-b+c)+(x-y)(b-a-c)
(x-A)*(B-y)=x^2-9xy+8y^2,求A,B
已知|x-y-3|+(a+b+4)²=0,求2a+2b-(a+b)分之(x-y)²-3(y-x)的值
分解公因式的题 x(a-x)(a-y)-y(x-a)(y-a)-ab(a-b)^2+a(b-a)^2a^3b-ab2ab
集合A={(X,Y)|2X-Y=0}B={(X,Y)|3X+Y=0}C=={(X,Y)|2X-Y=3}求A交B,A交C,
已知集合A={(x,y)|2x-y=0},B={(x,y)|3x+y=0},C={(x,y)|2x-y=3}求A∩B,A
1)已知4X=5y,求(X+y):y 2)已知(a-b):(a+b)=3:7,求a:b
设A=2x-3xy+y+x-3y,B=4x-6xy+2y+4x-y,若|x-3a|+(y+3)=0,且B-2A=a.求A
3a(x+y)-2b(x+y)=(x+y)(?)
已知集合A={(x,y|2x-y=0)},B={(x,y)|3x+y=0},C={(x,y)|2x-y=3},求A∩B,
已知集合A={(x,y)/2x—y=0},B={(x,y)/3x+y=0 }.C={(x,Y)/2x-y=3},求A∩B
设U={(X,Y)}|X,Y属于R},A={(X,Y)Y-3/X-2=1},B=(X,Y)|Y=X+1},求CuA与B的