(a-b)2(x-y)-(b-a)(y-x)2=(a-b)(x-y)×______.
3a(x+y)-2b(x+y)=(x+y)(?)
(x-A)*(B-y)=x^2-9xy+8y^2,求A,B
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
设集合A={(x,y)|y≥|x-2|,x>=0},B ={(x,y)|y
因式分解(a-b)²(x-y)-(b-a)(y-x)²=(a-b)(x-y)×( )
已知实数a,b,x,y,满足不等式(a+b)(x+y)>2(ay+bx),求证(x-y)/(a-b)+(a-b)/(x-
因式分解:x^2y^2-4x a(a-b)-2b(b-a)
对于有理数a,b,定义:a*b=3a-2b,若x,y均为有理数,试计算【(x+y)*(x-y)】*2 x.
1.x(x-y)+y(y-x)2.9(a-b)^2-16(a+b)^2 3.25(x-y)^2+10(y-x)+1
设集合A={(x,y)|y≥|x-2|,x≥0},B={(x,y)|y≤-x+b},若A∩B≠∅,(x,y)∈A∩B,且
设集合A={(x,y)/y=x^2},B={(x,y)/y=2^x},则A交B的子集个数()
若集合A={(x,y)/x²+y²=1},B={(x,y)/y²=2(x+)},则A∩B=